Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that only pets derive their nutrition from
A) preying on animals.
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B) ingesting it.
C) consuming living, fairly than dead, prey.
D) using enzymes to digest their food.
Which of the complying with is (are) unique to animals?A) cells that have mitochondria B) the structural carbohydprice, chitin C) nervous conduction and muscular activity D) heterotrophy E) flagellated gametes
In terms of food capture, which sponge cell is the majority of equivalent to the cnidocyte of a cnidarian?A) amoebocyte B) choanocyte C) epidermal cell D) gastrovascular cavity cell
Sponges are a lot of accurately explained asA) marine predators. B) chemoautotrophs. C) freshwater scavengers. D) filter feeders. E) aquatic predators.
Which of the complying with attributes as both a mouth and also an anus in members of the phylum Cnidaria?A) a noncentralized nerve net B) a gastrovascular cavity C) nematocysts D) an alimentary canal
Which of the following is true of members of the phylum Cnidaria?A) They are not qualified of locomotion bereason they absence true muscle tproblem. B) They are mostly filter feeders. C) They coordinate activities with a noncentralized nerve collection. D) They are the easiest organisms with a complete alimentary canal (2 openings).
The members of which clade in the phylum Cnidaria occur only as polyps?A) Hydrozoa B) Scyphozoa C) Anthozoa D) Arthropoda
The last widespread ancestor of all animals was more than likely a(n)A) chytrid. B) yeastern. C) algae. D) fungus. E) protist.
Evidence of which structure or characteristic would certainly be most surprising to discover among fossils of the Ediacaran fauna?A) true tconcerns B) hard body components C) bilateral symmetry D) embryos
The many primitive branch suggest in pet phylogeny is that in between havingA) radial and bilateral symmeattempt. B) a well-characterized head and also no head. C) true tconcerns and no tworries. D) a body cavity and also no body cavity.
According to the proof gathered so much, the pet kingdom isA) monophyletic. B) paraphyletic. C) no longer flourishing in size. D) thriving at an exponential price.
If a multicellular pet lacks true tworries, then it can effectively be contained among theA) eumetazoans. B) metazoans. C) choanoflagellates. D) lophotrochozoans. E) bilateria.
Which of the adhering to statements concerning animal taxonomy is (are) true?Animals are more very closely regarded plants than to fungi. All animal clades based on body arrangement have been found to be incorrect. Kingdom Animalia is monophyletic. Only pets reproduce by sexual indicates. Animals are thneed to have evolved from flagellated protists comparable to modern choanoflagellates. A) 5 just B) 1 and also 3 C) 3 and 5 D) 3, 4, and 5
If the current molecular proof regarding animal beginnings is well substantiated in the future, then what will certainly be true of any type of contrary evidence regarding the beginning of pets acquired from the fossil record?A) The contrary fossil proof will certainly be seen as a hoax. B) The fossil proof will be interpreted to have been taken mistakenly because it is incomplete. C) The fossil record will henceforth be ignored. D) Phylogenies including also the smallest little bit of fossil proof will certainly must be discarded. E) Only phylogenies based exclusively on fossil proof will have to be discarded.
Some researchers insurance claim that sponge genomes have actually homeotic genes (genes that regulate advancement of anatomical structures), but no Hox genes (genes that regulate advancement of posterior-anterior axes and body segments). If true, this finding wouldA) strengthen sponges" evolutionary ties to the Eumetazoa. B) suppose that sponges have to no much longer be classified as animals. C) confirm the identification of sponges as basal animals. D) intend that extinct sponges must have been the last common ancestor of pets and fungi. E) require sponges to be reclassified as choanoflagellates.
The last widespread ancestor of all bilaterians is thneed to have actually had 4 Hox genes (genes that regulate advance of posterior-anterior axes and also body segments). Most extant cnidarians have two Hox genes, other than Nematostella, which has 3 Hox genes. On the basis of these monitorings, some have proposed that the ancestral cnidarians were initially bilateral and also, in steras, lost Hox genes from their genomes. If true, this would certainly suppose thatA) Radiata must be a true clade. B) the radial symmetry of extant cnidarians is secondarily obtained, rather than being an ancestral trait. C) Hox genes play little actual duty in coding for an animal"s "body arrangement." D) Cnidaria may one day rearea porifera as the basal bilaterians.
Which statement is a lot of continuous via the hypothesis that the Cambrian explosion was resulted in by the increase of predator-prey relationships?A) enhanced incidence of worm burrows in the fossil document B) raised incidence of bigger pets in the fossil record C) enhanced incidence of organic product in the fossil document D) boosted incidence of tough body parts in the fossil document
Whatever before its ultimate cause(s), the Cambrian explosion is a prime instance ofA) mass extinction. B) evolutionary stasis. C) adaptive radiation. D) a huge meteor affect.
What is the probable sequence in which the adhering to clades of pets originated, from earliest to many recent?tetrapods vertebrates deuterostomes amniotes bilaterians A) 5 → 3 → 2 → 4 → 1 B) 5 → 3 → 2 → 1 → 4 C) 5 → 3 → 4 → 2 → 1 D) 3 → 5 → 4 → 2 → 1 E) 3 → 5 → 2 → 1 → 4
Fossil evidence shows that the complying with events emerged in what sequence, from earliest to most recent?Protostomes attack terrestrial settings. Cambrian explosion occurs. Deuterostomes invade terrestrial settings. Vertebrates come to be optimal predators in the seas. A) 2 → 4 → 3 → 1 B) 2 → 1 → 4 → 3 C) 2 → 4 → 1 → 3 D) 2 → 3 → 1 → 4 E) 2 → 1 → 3 → 4
Which of the following hereditary procedures might be most valuable in accounting for the Cambrian explosion?A) binary fission B) mitosis C) meiosis D) gene duplication
Which of these, if true, would support the case that the ancestral cnidarians had actually bilateral symmetry?Cnidarian larvae possess anterior-posterior, left-ideal, and dorsal-ventral elements. Cnidarians have actually fewer Hox genes than bilaterians. All extant cnidarians are diploblastic. All cnidarians are acoelomate. A) 1 just B) 1 and also 4 just C) 2 and 3 just D) 2 and 4 just E) 3 and also 4 just
Which of the complying with animal teams is totally aquatic?A) Mollusca B) Crustacea C) Echinodermata D) Nematoda E) Platyhelminthes
Chordate pharyngeal slits show up to have operated initially asA) the digestive system"s opening. B) suspension-feeding devices. C) components of the jaw. D) gill slits for respiration. E) portions of the inner ear.
Which of the following statements would certainly be least acceptable to the majority of zoologists?A) The extant lanceallows are contemporaries, not ancestors, of vertebrates. B) The initially fossils resembling lanceallows showed up in the fossil document approximately 530 million years ago. C) Recent occupational in molecular systematics supports the hypothesis that lanceallows are the basal clade of chordays. D) The extant lancelets are the immediate ancestors of the fishes. E) Lanceallows display the exact same approach of swimming as do fishes.
Which extant chordates are postulated to be a lot of choose the earliest chordays in physical appearance?A) lanceallows B) adult tunicates C) amphibians D) reptiles E) chondrichthyans
A new species of aquatic chorday is found that closely resembles an old develop. It has the adhering to characteristics: exterior armor of bony plates, no paired lateral fins, and a suspension-feeding mode of nutrition. In addition to these, it will certainly more than likely have actually which of the complying with characteristics?A) legs B) no jaws C) an amniotic egg D) endothermy
What perform all craniates have that previously chordays did not have?A) brain B) vertebrae C) cartilaginous pipe surrounding notochord D) partial or complete skull E) bones
The feeding mode of the extinct conodonts wasA) herbcream color. B) suspension feeding. C) predation. D) filter feeding. E) absorptive feeding.
The earliest well-known mineralized frameworks in vertebrates are associated via which function?A) remanufacturing B) feeding C) locomotion D) defense E) respiration
Jaws first emerged in which extant group of fishes?A) lampreys B) chondrichthyans C) ray-finned fishes D) lungfishes E) placoderms
Which of these can have actually been observed in the common ancestor of chondrichthyans and osteichthyans?A) a mineralized, bony skeleton B) limbs C) digits D) a swim bladder
Which group"s members have actually had actually both lungs and gills during their adult lives?A) sharks, skates, and rays B) lungfishes C) lanceallows D) bivalves
Which of the complying with belengthy to the lobe-fin clade?A) chondrichthyans B) ray-finned fishes C) lampreys D) hagfishes E) tetrapods
Ararray these taxonomic terms from most inclusive (most general) to leastern inclusive (the majority of specific).lobe-fins amphibians gnathostomes osteichthyans tetrapods A) 4, 3, 1, 5, 2 B) 4, 3, 2, 5, 1 C) 4, 2, 3, 5, 1 D) 3, 4, 1, 5, 2 E) 3, 4, 5, 1, 2
During chordate development, what is the sequence (from earliest to most recent) in which the adhering to structures arose?amniotic egg paired fins jaws four-chambered heart A) 2, 3, 1, 4 B) 3, 2, 1, 4 C) 4, 1, 3, 2 D) 2, 1, 3, 4 E) 1, 3, 2, 4
Which of the following are the the majority of plentiful and diverse of the extant vertebrates?A) ray-finned fishes B) birds C) amphibians D) mammals
What should be true of fossils of the earliest tetrapods?A) They must display proof of internal fertilization. B) They should show evidence of having produced shelled eggs. C) They need to suggest limited adaptation to life on land also. D) They have to be transitional creates via the fossils of chondrichthyans that lived at the exact same time. E) They need to attribute the earliest indications of the appearance of jaws.
Which of these are amniotes?A) amphibians B) fishes C) mammals D) placental mammals only E) egg-laying mammals just
Why is the amniotic egg taken into consideration an essential evolutionary breakthrough?A) It has a shell that boosts gas exreadjust. B) It enables deplace of eggs in a terrestrial environment. C) It prolongs embryonic development. D) It gives insulation to conserve warmth. E) It permits interior fertilization to be reinserted by exterior fertilization.
Which of these attributes included a lot of to vertebprice success in reasonably dry environments?A) the shelled, amniotic egg B) the capability to preserve a consistent body temperature C) 2 pairs of appendages D) bony scales E) a four-chambered heart
Which of the following are the only extant pets that descfinished directly from dinosaurs?A) lizards B) crocodiles C) snakes D) birds E) tuataras
A trend initially oboffered in the development of the earliest tetrapods wasA) the appearance of jaws. B) the appearance of bony vertebrae. C) feet via digits. D) the mineralization of the endoskeleton. E) the amniotic egg.
Among the invertebprice phyla, phylum Arthropoda is distinctive in possessing members that haveA) a cuticle. B) a ventral nerve cord. C) open circulation. D) wings. E) segmented bodies.
Arthropods invaded land around 100 million years prior to vertebrates did so. This a lot of plainly suggests thatA) arthropods advanced prior to vertebprices did. B) extant terrestrial arthropods are much better adapted to terrestrial life than are extant terrestrial vertebprices. C) ancestral arthropods must have been poorly adapted to aquatic life and hence competent a selective pressure to attack land. D) vertebprices advanced from arthropods. E) arthropods have actually had more time to coevolve via land plants than vertebrates have actually had actually.
Which of these would a paleontologist be many most likely to execute in order to recognize whether a fossil represents a reptile or a mammal?A) Look for the visibility of milk-creating glands. B) Look for the mammalian features of a four-chambered heart and a diaphragm. C) Because mammals are eutherians, look for evidence of a placenta. D) Use molecular analysis to look for the protein keratin. E) Examine the teeth to determine just how sharp or ground dvery own they are.
In which vertebrates is fertilization specifically internal?A) chondrichthyans, osteichthyans, and also mammals B) amphibians, mammals, and also reptiles C) chondrichthyans, osteichthyans, and also reptiles D) reptiles and mammals E) reptiles and amphibians
Internal fertilization, leathery amniotic eggs, and skin that resists drying are features of which extant vertebprice group?A) amphibians B) non-bird reptiles C) chondrichthyans D) mammals E) birds.
Organisms at which of the following trophic levels enhanced the the majority of because of the activity of pets onto land?A) herbivores and also carnivores B) decomposers and producers C) producers D) decomposers
The decrease of cyanobacteria in the early Cambrian seas was the majority of likely connected toA) the activity of pets onto land also. B) the advancement of land also plants. C) a boost in the number of predatory fish. D) a rise in organisms with suspension-feeding mouthcomponents. E) a decline in the number of marine decomposers.
If every one of the animals died in a huge region of an ocean, we would suppose an increase in theA) variety of filter feeders. B) number of cyanobacteria. C) variety of decomposers. D) clarity of the sea waters. E) temperature of the ocean waters.
Evidence suggests that an ancestral finch species from South America arrived at the Galapágos Islands and also formed many type of brand-new species, adapting to the diverse environments on the islands. With the development of these new bird species on the Galapágos Islands, we would expect to uncover a correspondingA) boost in the variety of bird parasites on the Galapágos Islands. B) decrease in the variety of bird parasites on the Galapágos Islands. C) rise in the number of bird parasites in South America. D) decrease in the number of bird parasites in South America. E) elimination of bird parasites on the Galapágos Islands.
A new, sixth international mass-extinction occasion shows up to be occurring on Planet today. The a lot of most likely explacountry for the dramatic loss of species isA) climate adjust. B) herbal fluctuations in international temperatures and also precipitation. C) the evolution of new forms of viruses. D) humale activity that alters organic settings. E) decreases in atmospheric levels of oxygen.
As an outcome of harvesting a greater proportion of older and bigger cod and various other fish species for food,A) the number of fish in these populations has raised drastically. B) the age and dimension of fish getting to sexual maturity have actually reduced. C) many kind of new species of predators have actually developed in these areas. D) the impacted fish species have stopped recreating. E) many of the fish in these populaces have started to reproduce asexually.
Which of the following features distinguishes contemporary human beings from various other modern apes?Humans walk upright. Humans walk on two legs. Humans usage basic devices. Humans are capable of symbolic believed. A) 2 and also 3 just B) 1, 2 and 4 just C) 2, 3, and also 4 just D) 1, 2, 3, and also 4 only
What is a major, widespread evolutionary function of all reptiles, mammals, and also birds?A) teeth B) endothermic behavior C) gastrovascular cavity D) amniotic egg
One important evolutionary change that arisen via the climb of pets isA) a adjust from a microbe-just environment to among big producers, predators, and also prey. B) the extinction of cyanobacteria. C) a marine ecosystem supremacy of sponges and cnidarians. D) a confirmed second widespread ancestor of animals.
If wild dogs take part in cooperative searching, they will certainly most likely have a far better outcome than if they hunt alone, especially if they share the prey. The dogs that cooperate are raising the survival probcapacity of one one more. This is an example ofA) parasitism. B) reciprocal selection. C) protective adaptations. D) adaptive radiation.
Humans commonly use pesticides on plants as a means to regulate insect and also plant pests. However, pesticides are not selective in what they kill, so they regularly kill beneficial insect and plant species also. This unintentional consequence favors plant and insect species that are pesticide resistant. This scenario is an example ofA) humale impacts on evolution. B) reciprocal selection. C) humale impacts upon antibiotic resistance. D) mass extinction of plant species.
A student catches a ray-finned fish from the sea and notices that attached to its flank is an equally long, snakefavor organism. The attached organism has actually no exterior segmentation, no scales, a slimy substance on its surface, a round mouth surrounded by a sucker, a tongue, and also two small eyes. The student thinks it might be a marine hagfish or a lamprey. Which feature excludes the organism from possibly being a lamprey?A) elongated form B) lack of scales C) a slimy substance on its surchallenge D) round mouth E) tongue
Using similarities in body symmetry and also various other anatomical functions to asauthorize an organism to a clade involvescladistics based upon body arrangement. molecular-based phylogeny. morphology-based phylogeny. A) 1 just B) 2 only C) 3 just D) 1 and also 2 only E) 1 and also 3 only
Which of the adhering to is a point of dispute between the phylohereditary analyses presented in these 2 figures?A) the partnership of taxa of segmented pets to taxa of nonsegmented pets B) that sponges are basal pets C) that chordates are deuterostomes D) the evolutionary partnership in between Nematoda and Arthropoda
What is true in the molecular phylogeny (B) that is not true in the standard phylogeny (A)?A) Deuterostomia is paraphyletic. B) To keep Deuterostomia as a clade, some phyla had to be removed from it. C) Deuterostomia currently contains the Acoela. D) It diverged from the remainder of the Bilateria previously than did the Acoela.
In the traditional phylogeny (A), the phylum Platyhelminthes is depicted as a sister taxon to the remainder of the protostome phyla and also as having diverged previously from the family tree that brought about the rest of the protostomes. In the molecular phylogeny (B), Platyhelminthes is portrayed as a lophotrochozoan phylum. What most likely caused this change?A) Platyhelminthes ceased to be known as true protostomes. B) The removal of the acoel flatworms (Acoela) from the Platyhelminthes permitted the staying flatworms to be plainly tied to the Lophotrochozoa. C) All Platyhelminthes need to have a well-emerged lophophore as their feeding apparatus. D) Platyhelminthes" close hereditary ties to the arthropods came to be clear as their Hox gene sequences were studied.
What conclusion is apparent from the data in Table 27.1?A) Land also pets have actually more Hox genes than carry out those that live in water. B) All bilaterian phyla have had the exact same degree of growth in their numbers of Hox C) Acoel flatworms have to be expected to contain seven Hox D) The development in variety of Hox genes throughout vertebrate development cannot be defined just by three duplications of the ancestral vertebprice Hox E) Extant insects all have salso Hox
All points being equal, which of these is the most basic explacountry for the change in the variety of Hox genes from the last common ancestor of insects and vertebrates to ancestral vertebprices, as displayed in Table 27.1?A) The occurrence of salso independent duplications of individual Hox B) The incident of 14 independent duplications of individual Hox genes C) The event of 2 distinctive duplications of the entire seven-gene cluster, followed by the loss of one cluster. D) The incident of a single duplication of the entire seven-gene cluster.
Which tree(s) has (have) been produced by emphasizing genomic features of placozoans?A) I just B) II just C) III just D) I and II
Which tree(s) has actually (have) been created by emphasizing the structural simplicity of placozoans?A) I just B) II just C) III only D) II and also III
Which tree(s) has actually (have) been developed by emphasizing a protein discovered in placozoans?A) I only B) II just C) III just D) I and III
Fishes that have actually swim bladders have the right to control their thickness and thus their buoyancy. There are two kinds of swim bladder: physostomous and also physoclistous. The ancestral variation is the physostomous version, in which the swim bladder is connected to the esophagus via a brief tube (Figure 27.2). The fish fills this variation by swimming to the surchallenge, taking gulps of air, and directing them into the swim bladder. Air is rerelocated from this variation by "belching." The physoclistous variation is even more acquired and has actually lost its link to the esophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wevery one of the swim bladder.
The presence of a swim bladder enables the typical ray-finned fish to soptimal swimming and stillA) properly circulate its blood. B) be extremely maneuverable. C) use its swim bladder as a respiratory body organ. D) not sink.
Fishes that have swim bladders can regulate their density and also for this reason their buoyancy. Tright here are two types of swim bladder: physostomous and also physoclistous. The ancestral version is the physostomous version, in which the swim bladder is connected to the esophagus by means of a brief tube (Figure 27.2). The fish fills this version by swimming to the surchallenge, taking gulps of air, and also directing them into the swim bladder. Air is rerelocated from this variation by "belching." The physoclistous variation is more derived and also has actually shed its link to the esophagus. Instead, gas enters and also leaves the swim bladder by means of special circulatory mechanisms within the wall of the swim bladder.
If a physoclistous fish clears gas from its swim bladder, this fish"s thickness cannot actually adjust till that gas arrives at theA) mouth. B) gills. C) skin. D) heart. E) anus.
Which graph effectively depicts the relationship in between the amount of gas in the swim bladder and the thickness of the fish?A) A B) B C) C D) D E) E
How execute a physoclistous fish and a physotomous fish compare in regards to the amount of energy each have to use to maintain its position (depth) in the water column over the long term?A) a physoclistous fish uses more energy than a physostomous fish B) a physostomous fish uses more power than a physoclistous fish C) a physoclistous fish and also a physostomous fish use the very same amount of power D) a physoclistous fish initially uses even more power than a physostomous fish but then decreases its energy use to be equal to the physostomous fish
Trichoplax adhaerens (Tp) is the just living species in the phylum Placozoa. Individuals are around 1 mm wide and just 27 μm high, are irregularly shaped, and consist of a total of around 2,000 cells, which are diploid (2n = 12). Tright here are 4 types of cells, namong which is a nerve or muscle cell, and also namong which has actually a cell wall. They move using cilia, and any type of "edge" have the right to lead. Tp feeds on marine microbes, greatly unicellular green algae, by crawling atop the algae and also trapping it in between its ventral surface and the substrate. Enzymes are then secreted onto the algae, and also the resulting nutrients are soaked up. Tp sperm cells have never been oboffered, nor have embryos previous the 64-cell (blastula) stage.
In which of the adhering to ways is Tp equivalent to a typical animal?Tp is multicellular. Tp lacks muscle and nerve cells. Tp has actually cilia. Tp lacks cell walls. Tp does not have observable sperm cells. A) 1 and also 2 only B) 1 and 3 just C) 1, 3, and 5 just D) 3, 4, and 5 only E) 1, 2, 3, 4, and 5
Trichoplax adhaerens (Tp) is the only living species in the phylum Placozoa. Individuals are about 1 mm wide and just 27 μm high, are irregularly shaped, and consist of a total of around 2,000 cells, which are diploid (2n = 12). Tbelow are four forms of cells, none of which is a nerve or muscle cell, and also namong which has a cell wall. They relocate utilizing cilia, and any kind of "edge" have the right to lead. Tp feeds on marine microbes, largely unicellular green algae, by crawling aoptimal the algae and trapping it between its ventral surconfront and also the substrate. Enzymes are then secreted onto the algae, and the resulting nutrients are absorbed. Tp sperm cells have never before been oboffered, nor have actually embryos past the 64-cell (blastula) phase.
On the basis of the information in the previous paragraph, which of these should be able to be oboffered in Tp?A) the act of fertilization B) the procedure of gastrulation C) the presence of eggs D) A and B just E) A, B and C
Trichoplax adhaerens (Tp) is the only living species in the phylum Placozoa. Individuals are around 1 mm wide and also only 27 μm high, are iron a regular basis shaped, and consist of a complete of around 2,000 cells, which are diploid (2n = 12). Tright here are four types of cells, none of which is a nerve or muscle cell, and also none of which has a cell wall. They move making use of cilia, and any kind of "edge" have the right to lead. Tp feeds on marine microbes, largely unicellular green algae, by crawling apeak the algae and trapping it between its ventral surface and also the substrate. Enzymes are then secreted onto the algae, and also the resulting nutrients are soaked up. Tp sperm cells have never before been oboffered, nor have embryos past the 64-cell (blastula) stage.
Tp"s body symmeattempt seems to be many favor that ofA) most sponges. B) cnidarians. C) worms. D) tetrapods.
An elementary school scientific research teacher made a decision to liven up the classroom through a saltwater aquarium. Knowing that saltwater aquaria have the right to be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher determined to stock the tank through various marine invertebrates, including a sea star, a sponge, a sea urchin, a jellyfish, a number of hermit crabs, some sand dollars, and also an ectoproct. Last, she added some vertebprices — a parrotfish and a clownfish. She arranged for everyday feedings of copepods and also feeder fish.
One day, Tommy (a student in an undersupervised class of 40 fifth graders) got the urge to pet Nemo (the clownfish), who was swimming among the waving petals of a pretty underwater "flower" that had a huge hole in the midst of the petals. Tommy giggled upon finding that these petals felt sticky. A few hrs later on, Tommy remained in the nurse"s office through nausea and cramps. Microscopic examicountry of his fingers would more than likely have actually revealed the visibility ofA) teeth marks. B) spines. C) spicules. D) nematocysts. E) a radula.
An elementary institution scientific research teacher chose to liven up the classroom through a saltwater aquarium. Knowing that saltwater aquaria can be fairly a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next off, the teacher determined to stock the tank via various marine invertebrates, including a sea star, a sponge, a sea urchin, a jellyfish, several hermit crabs, some sand dollars, and an ectoproct. Last, she added some vertebprices — a parrotfish and a clownfish. She arranged for everyday feedings of copepods and feeder fish.
Had the teacher wanted to allude out organisms that relocate and also feed making use of the same structural adaptation, the teacher need to have actually favored theA) sponge and the jellyfish. B) hermit crabs and also the ecotoprot. C) sea star, sea urchin, and sand dollars. D) vertebrates.
The a lot of freshly uncovered phylum in the pet kingdom (1995) is the phylum Cycliophora. It has three species of tiny organisms that live in big numbers on the outsides of the mouthcomponents and also appenderas of lobsters. When in the feeding stage, a cycliophoran permanently attaches to the lobster by means of an adhesive disk and also collects scraps of food from its host"s feeding by recording the scraps in a present created by a ring of cilia. Its body is sac-choose and also has a U-shaped intestine that brings the anus cshed to the mouth. Cycliophorans are eucoelomate (have actually a body cavity that is a coelom) and execute not molt (though their hold does).
Which of these functions is least advantageous in assigning the phylum Cycliophora to a clade of animals?A) having actually a true coelom as a body cavity B) having actually a body symmeattempt that permits a U-shaped intestine C) doing not have ecdysis (molting) D) its feeding device
The most newly found phylum in the pet kingdom (1995) is the phylum Cycliophora. It includes three species of tiny organisms that live in large numbers on the outsides of the mouthcomponents and also appendperiods of lobsters. When in the feeding stage, a cycliophoran permanently attaches to the lobster using an adhesive disk and also collects scraps of food from its host"s feeding by recording the scraps in a existing developed by a ring of cilia. Its body is sac-like and also has actually a U-shaped intestine that brings the anus cshed to the mouth. Cycliophorans are eucoelomate (have actually a body cavity that is a coelom) and perform not molt (though their hold does).
Basing your inferences on information in the previous paragraph, to which clade(s) need to cycliophorans belong?Eumetazoa Deuterostomia Bilateria Ecdysozoa Lophotrochozoa A) 1 only B) 1 and also 3 just C) 1, 3, and also 5 only D) 2, 3, and also 4 just E) 2, 3, and also 5 only
The a lot of newly found phylum in the pet kingdom (1995) is the phylum Cycliophora. It has 3 species of tiny organisms that live in big numbers on the outsides of the mouthcomponents and appendperiods of lobsters. When in the feeding phase, a cycliophoran permanently attaches to the lobster via an adhesive disk and also collects scraps of food from its host"s feeding by catching the scraps in a current produced by a ring of cilia. Its body is sac-like and also has actually a U-shaped intestine that brings the anus cshed to the mouth. Cycliophorans are eucoelomate (have actually a body cavity that is a coelom) and carry out not molt (though their hold does).
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What is true of the feeding phase of cycliophorans?It is chemoheterotrophic. It is sessile. Its tube feet enable it to feed successfully. It has actually radial symmetry. A) 1 and also 2 only B) 1 and 3 just C) 2 and also 4 just D) 1, 2, and also 3 only E) 2, 3, and 4 only
The most recently discovered phylum in the animal kingdom (1995) is the phylum Cycliophora. It consists of 3 species of tiny organisms that live in big numbers on the outsides of the mouthcomponents and appenderas of lobsters. When in the feeding stage, a cycliophoran permanently attaches to the lobster using an adhesive disk and collects scraps of food from its host"s feeding by capturing the scraps in a present produced by a ring of cilia. Its body is sac-like and also has actually a U-shaped intestine that brings the anus cshed to the mouth. Cycliophorans are eucoelomate (have a body cavity that is a coelom) and do not molt (though their organize does).
Cycliophorans have actually 2 types of larvae. One form of larva is created as soon as the digestive system of a female is impregnated by a male. The digestive device then collapses and develops into a larva, which swims away trying to find a brand-new organize after the surrounding female dies. Which is the embryonic tproblem that is supposedly most crucial in developing this kind of larva?A) mesoderm B) ectoderm C) endoderm D) mantle
Which of the adhering to clades contains the biggest number of pet species?A) the vertebrates B) the bilaterians C) the deuterostomes D) the insects
Fossil steroid and also molecular clock evidence says that animals originatedA) in between 710 and 770 million years earlier. B) more than 100 million years prior to the earliest well-known fossils of large pets. C) in the time of the Cambrian explosion. D) both A and also B
Which of the adhering to was probably the least crucial factor in bringing about the Cambrian explosion?A) the development of predator-prey relationships among animals B) the build-up of sufficient atmospheric oxygen to assistance the even more active metabolism of mobile animals C) the activity of animals onto land also D) the beginning of Hox genes and various other hereditary changes affecting the regulation of developmental genes
Which of the complying with could be taken into consideration the many current prevalent ancestor of living tetrapods?A) a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports equivalent to those of terrestrial vertebprices B) an armored gnathostome through 2 pairs of appendages C) an early ray-finned fish that arisen bony skeletal supports in its paired fins D) a salamander that had legs sustained by a bony skeleton but moved through the side-to-side bfinishing typical of fishes