Alan Cooper, Cécile Mourer Chauviré, Geoffrey Chambers, Arndt von Haeseler, Allan Wilson and Svante Pääbo investigated the evolutionary relationships among some extinct and living species of flightless birds. They concluded that kiwis are more closely related to African and Australian flightless birds than they are to the moas. What new hypothesis did they propose based on this conclusion?
A. That flightless birds only occurred once in New Zealand.
B. That New Zealand was colonized twice by ancestors of flightless birds.
C. That the North American flightless bird originated from an ancestor of the New Zealand species.
D. That their data was incorrect and the sample from the museum was corrupted.
E. That the South American species' ancestors flew to New Zealand before the flightless mutation occurred.
Answer: B
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Which of the following have the most efficient lungs: amphibians, mammals or birds? Explain your
answer. What will be an ideal response?
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He function of the structure labeled 6 in Figure 41-1 is:
T
a. insulation.
b. neurotransmitter release.
c. binding neurotransmitters.
d. conduction of an electrical signal.
e. acting as a ligand-gated channel.