9. Members of the Animal Kingdom most likely evolved from an ancestor resembling
ID: 255636 • Letter: 9
Question
9. Members of the Animal Kingdom most likely evolved from an ancestor resembling A. a multicellular heterotrophic alga B. a multicellular heterotrophic fungus C. a colonial unicellular nucleariid protist D. a colonial unicellular charyophytic protist E. a colonial unicellular choanoflagellate protist 10. Which of the following is NOT a characteristic of most animals? A. an indeterminate growth pattern B. Hox developmental genes C.collagen D. a diplontic life cycle E. muscles and nerves 11. In which cnidarian class are individuals exclusively polyps? A. Hydrozoa B. Cubozoa C. Hydrozoa D. Anthozoa E. Scyphozoa 12. Which of the following do NOT have an open circulatory system? A. snails B. earthworms C. clams D. sea slugs E. nudibranchs 13. Amoebocytes are stem-like cells in which animal group? A. planarian wormsB. coral polyps C. sponges D. leeches E. tapeworms 14. Colloblasts are glue-secreting cells found in A. a Portugese-Man-of-War B. box jellies C. polychaete tube worms D.coral polyps E. comb jellies 15. The "jelly" of jellyfish and other members of their phylum is known as A. mesoglea B. mesoderm C. a gastrovascular cavity D. mesohyle E. mesenchymeExplanation / Answer
Ans 10: A.
Growth which is not terminated is referred to indeterminate growth. Plants are acpable of this type of growth by virtue of presence of perpetually embryonic tissues called meristems present in their growth regions.
Ans 9: E.
Growth which is not terminated is referred to indeterminate growth. It is a widely accepted fact that the members of the Kingdom Animalia evolved from flagellate species. Current simplest forms of animals, like sponge do resemble choanocyte cells similar to Choanoflagellates protist species.
Ans 10: A.
Growth which is not terminated is referred to indeterminate growth. Plants are capable of this type of growth by virtue of presence of perpetually embryonic tissues called meristems present in their growth regions.
Ans 11: D.
Class Anthozoa within phylum Cnidariais comprises of marine invertebrates that are exclusively polyps. e.g. sea anemones, stony and soft corals.
Ans 12: B.
Though most invertebrates like snails and clams have open circulatory system earthworm and squids are an exception and show close circulatory system like humans.
Ans 13: C.
Amoebocytes perform several functions in the sponge like giving rise to eggs for sexual reproduction and delivering engulfed sperms from choanocytes to eggs.
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