9. The Cambrian is a/an a. Era b. Epoch c. Period d. Eon 10. Both animals and fu
ID: 39682 • Letter: 9
Question
9. The Cambrian is a/an
a. Era b. Epoch c. Period d. Eon
10. Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that most animals derive their nutrition by _____.
A. feeding on both animals and plants
B. ingesting other organisms or dead organic matter and digesting the ingested material internally.
C. consuming living, rather than dead, prey
D. using enzymes to digest their food
11. Which of the following bits of evidence supports the hypothesis that animals and choanoflagellates share a common ancestror and that the ancestor of animals was something like a choanoflagellate?
A. One choanoflagellate, Monosiga bevicollis, was found to contain 78 protein domains of proteins involved in cell adherence and cell signalling. The only other group of organisms known to contain these domains are animals. The domains can be considered a synapomorphy for the clade that includes choanoflagellates and animals.
B. Choanoflagellates are very similar to choanocytes, the feeding cells of sponges.
C. Some choanoflagellates are colonial, living in groups, stuck to one another.
D. All of the above.
12. Arthropods invaded land about 100 million years before vertebrates did so. This implies that _____.
A. arthropods evolved before vertebrates did
B. extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates
C. vertebrates evolved from arthropods
D. arthropods have had more time to coevolve with land plants than have vertebrates
13. Which tissue type, or organ, is NOT correctly matched with its embryonic tissue layer?
A. nervous
Explanation / Answer
9. cambrian is a period
10. d
11
12 a
13. d
14 c
15. c
16 false
17 grades
18. deuterostomes
19 protostomes
20 deuterostomes
21 protostomes
22. protostomes
23. deuterostomes
24. protostomes
25 deuterostomes.
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