Learning is most common in animals that
A. are large.
B. have large brains.
C. live in complicated environments.
D. must communicate in order to reproduce.
B. have large brains.
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The thin horizontal arrows in the figure above show that the _____
A) warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well B) warmer venous blood transfers heat to the cooler arterial blood C) warmer arterial blood transfers heat to the cooler venous blood D) arterial blood is always cooler in the abdomen, compared to the temperature of the venous blood in the feet of the goose E) goose's legs get progressively warmer as the blood moves away from the abdomen towards the feet
Embryonic Stem cells are _____.
a) pleiotrophic b) oncogenetic c) totipotent d) pluriptent
Which peak corresponds to cells in G1? In S phase? In G2?
A) A: G1; B: G2; C: S B) A: G2; B: S; C: G1 C) A: S; B: G1; C: G2 D) A: G1; B: S; C: G2
What would be a reasonable conclusion about a country with a fertility rate of about 1.6?
A) The population is likely to shrink. B) The population will grow at a yearly rate of 1.6 percent. C) It must be a relatively young population. D) Zero population growth will occur.