I. Which does NOT apply to Cnidaria? (If all do apply, then please select E.) A.
ID: 255635 • Letter: I
Question
I. Which does NOT apply to Cnidaria? (If all do apply, then please select E.) A. nematocysts B. nerve net C.diploblastic D pseudocoelom E.all (A-D) apply to cnidarians 2. What feature seen in some oligochaetes is lacking in polychaetes? A. parapodia B. epidermis C. typhlosole D. a complete gutE. metanephridia 3. Which of the following animal groups and larval type are incorrectly matched? A. Cnidaria -planula B. Porifera -parenchymula C. Annelida- veliger D. Mollusca - trochophore (no choice "E") 4. An earthworm is a member of the class A. Oligochaeta B. Turbellaria C. Polychaeta D. Trematoda E. Cestoda 5. Tapeworms in the Class exist as a chain of reproductive units called A. Trematoda; metameres B. Trematoda; proglottids C. Cestoda; metameres D. Cestoda; proglottids (no "E-) 6. Members of the animal kingdom first appeared approximately A. 845 million years ago B. 1.25 billion C. 1.25 million D. 455 million E. 635 million 7. Which of the following is descriptive of protostomes? A. spiral and determinate cleavage, blastopore becomes anus, enterocoelous coelom B. spiral and indeterminate cleavage, blastopore becomes mouth, schizocoelous coelom C. radial and indeterminate cleavage, blastopore becomes anus, enterocoelous coelom D. spiral and determinate cleavage, blastopore becomes mouth, schizocoelous coelom E. radial and determinate cleavage, blastopore becomes mouth, schizocoelous coelom 8. Which was significant about the evolution of a gastrovascular cavity in animals? A. It permitted extracellular digestion. B. It permitted the ingestion of larger prey. C. It permitted intracellular digestion. D. choices A and B apply E. choices B and C apply.Explanation / Answer
Answer 1. Option E
Cnidarians have all the given features. Eg Hydra nematocysts are found in the tentacles act as sensory part, nervous system is composed of nerve net, they contain 2 germ layers thus diploblastic and contain false color called pseudocoelom.
Answer 2. Option C
Typhlosole is present in the earthworm it helps to increase the intestinal surface area so that more nutrients can be absorbed.
Answer 3. Every option is correctly matched with their larval forms thus answer is option E.
Answer 4. Option A
It is the most important member of the class Oligochaeta that helps in increasing the fertility of the soil naturally thus used for preparing vermicompost.
Answer 5. Option D
Tapeworm belongs to class Cestoda, it completes its life cycle in 2 hosts and contain repetitive segments in their body termed as proglottids.
Answer 6. Option A
However, if you look down the history then we will find that animal Kingdom evolved around 635 to 543 million years ago or may. But as per the given options with the question option A seems best.
Answer 7. Option A
Protosomes are characterised by spiral and determinate cleavage and in them mouth develops prior to anus.
Answer 8. Option C
However, gastrovascular cavity helps in intracellular digestion plus circulation of nutrients in the body.