Which of the following are cnidarians?
A. sponges and jellyfish
B. jellyfish and sea anemones
C. sea anemones and mollusks
D. mollusks and sponges
B
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Why is it that RNA can catalyze reactions but DNA cannot?
A) The sugar of RNA is much more reactive than the sugar of DNA. B) The bases of RNA are much more reactive than the bases of DNA. C) The phosphate groups of RNA are much more reactive than the phosphate groups of DNA. D) The primary structure of RNA is fundamentally different than the primary structure of DNA.
Which of the following represents the correct order of evolution of requirements for complex multicellularity in animals?
A. adhesion, cell signaling, gap junctions, bulk transport B. adhesion, gap junctions, cell signaling, bulk transport C. gap junctions, cell signaling, adhesion, bulk transport D. bulk transport, adhesion, gap junctions, cell signaling
What information would be most useful for studying the evolution of a worm species?
A. the diet of birds in the area that eat the worms B. similarities in histone genes between other worms and the studied worm C. the locations where the worms are found comparisons with other invertebrates in the same area
Over time, the same bones in different vertebrates were put to different uses. This falls under the category of
A. heterologous structures. B. analogous structures. C. homologous structures. D. vestigial organs.