Which of the following is NOT TRUE regarding the evolutionary trends from ape-like ancestors to modern humans?
A. The evolution of larger brain size facilitated
the evolution of bipedal posture.
B. The evolution of bi-pedal posture would
have facilitated long-distance travel since
walking on two legs is more energetically
efficient than four legs.
C. The evolution of bi-pedal posture would
facilitate tool use by freeing up the hands.
D. Many primates are partially bi-pedal as
indicated by knuckle-walking.
A
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How many times does the protein in the figure cross the cell membrane?
A) 1 B) 3 C) 4 D) 7
Examine Figure 44.1 in your text. According to this phylogeny, bilaterians (animals with bilateral symmetry) are most closely related to:
A. cnidarians. B. sponges. C. the group containing sponges and cnidarians. D. the group containing choanoflagellates, sponges, and cnidarians. E. None of the answer options are correct.
Given the diversity in protist ultrastructure and molecular data, biologists regard the protists as a(n) ____ group,
meaning that some are descendants of a common eukaryote ancestor. a. monophyletic b. paraphyletic c. polyphyletic d. homoplastic e. homologous
Flattened sacs of internal membranes associated with photosynthesis are called
A. cristae. B. the stroma. C. thylakoids. D. photosystems. E. chloroplasts.