26. ____Mouth froms from the embryonic blastopore 27. ____Blastopore develops in
ID: 39713 • Letter: 2
Question
26. ____Mouth froms from the embryonic blastopore
27. ____Blastopore develops into anus and mouth develops at opposite end of the embryo.
28. ____ Echinoderms and chordates have this mode of embryonic development.
29. ____ Arthropods and mollusks have this mode of embryonic development.
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.
1. Which of the following is/are unique to animals?
A. They use chitin as the primary structural carbohydrate
B. They have a nervous system that conducts signals and muscular movement
C. They get nutrition by heterotrophy
D. They have flagellated gametes
E. They lack cell walls
True or False?
5. ____ Like many other gene families, Hox gene families arose by gene duplication.
7. ____ Fossils of animals with shells have been found in pre-cambrian rocks.
17. ____ The terms coelomate and pseudocoelomate describe grades, not clades.
26. ____Mouth froms from the embryonic blastopore 27. ____Blastopore develops into anus and mouth develops at opposite end of the embryo. 28. ____ Echinoderms and chordates have this mode of embryonic development. 29. ____ Arthropods and mollusks have this mode of embryonic development. 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. 1. Which of the following is/are unique to animals? A. They use chitin as the primary structural carbohydrate B. They have a nervous system that conducts signals and muscular movement C. They get nutrition by heterotrophy D. They have flagellated gametes E. They lack cell walls True or False? 5. ____ Like many other gene families, Hox gene families arose by gene duplication. 7. ____ Fossils of animals with shells have been found in pre-cambrian rocks. 17. ____ The terms coelomate and pseudocoelomate describe grades, not clades.Explanation / Answer
26. Protostomes
27. Deuterostomes
28. Deuterostomes
29. Protostomes
11. D. All of the above.
1. C. They get nutrition by heterotrophy
E. They lack cell walls
5. True
7. True
17. True
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