All immune cells of the lymphatic system originate in the _____.
What will be an ideal response?
bone marrow
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A pinniped is observed as lacking external ears, and it appears to propel through the water using its hind flippers only. What kind of pinniped might this be?
a. Phocids b. Sirenia c. Eared seals d. Walruses
Explain how bone remodeling can have both positive and negative consequences for an individual
What will be an ideal response?
The pattern of distribution for a certain species of kelp is clumped. The pattern of distribution for a population of snails that live on the kelp would be
A) clumped. B) random. C) uniform.
Ras mutations involving amino acid 12 may be oncogenic if they
a) Destabilize the protein causing it to fall apart b) Increase the cleavage rate of bound GTP back to GDP c) Stabillize the binding of GTP to Ras d) Block the ability of Ras to interact with its normal downstream targets