You are studying two populations of a certain species of frog in two ponds five kilometers apart. There are no other ponds in the area. In pond A all the frogs are small and have a few black spots on them. In pond B most of the frogs are large and lack spots but a few are small without spots and a few are large with spots. Because of the differences in these two populations
A. the distance between ponds is probably a barrier.
B. there is probably little interbreeding between the two populations.
C. the population in pond A could have gone through a genetic bottleneck.
D. All of the choices could be correct.
D. All of the choices could be correct.
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The animal phylum with the most species is
(a) Mollusca. (b) Annelida. (c) Arthropoda. (d) Platyhelminthes.
The defining trait of hominins is ____
a. large brain b. shoulder that can rotate 360 degrees c. bipedalism d. extended care of young e. nails on fingers and toes
Activated by directly binding to GTP
a. Adenylate cyclase b. G-protein c. Carrier protein d. cAMP e. Ion channel receptor protein
Why might the xiphoid process be missing from the sternum in a set of human remains?
a. The remains are from an adult younger than 40 years of age, and the hyaline cartilage does not preserve as well as bone. b. Because the xiphoid process may be broken off if the individual had been given CPR c. Because the xiphoid process shrinks with age d. Because the xiphoid process is small and does not articulate with any other bones