A recent study of SINEs in whales and other mammals generated results that show that whales are
derived from a common ancestor with
a. pigs and camels.
b. dogs and cats.
c. ruminants and hippos.
d. sharks and rays.
e. elephants and horses.
C
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A phosphatase is capable of dephosphorylating molecules. What would this enzyme do in a signal transduction pathway that used a kinase cascade?
A. Turn off the cascade. B. Activate the cascade. C. Phosphorylate a receptor. D. Serve as a ligand for the receptor. E. Phosphorylate a transcription factor.
With sexual reproduction, two genes for the same trait that are slightly different are called __________. Fill in the blank(s) with the appropriate word(s)
In which cell division do the DNA's of mom and dad match up?
A. Meisosis B. Mitosis
For a plant to initiate chemical responses to herbivory, before it is directly affected by herbivores, _____
A) a plant must have already flowered at least once B) volatile "signal" compounds must be perceived C) gene-for-gene intraspecific recognition must occur D) phytoalexins must be released