Lancelets possess which of the following as adults?
a. notochord
b. gill slits
c. nerve cord
d. segmented muscles
e. all of these
Answer: e
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The vegetative cells of the simple multicellular organism Volvox function in:
A. reproduction. B. photosynthesis. C. oxygen uptake. D. All of these choices are correct.
When a neuron undergoes a change in membrane potential that is proportional to (i.e., varies depending on) the strength of the stimulus given to that neuron, this is referred to as a/an
A. equilibrium potential. B. action potential. C. resting potential. D. reversal potential. E. graded potential.
Identify the chemoreceptor(s) important for detecting possible toxic substances.
A. salty B. sweet C. sour D. bitter E. salty and sweet
Babies who are born following PGD to select for a tissue match to an ailing sibling are referred to as
____________________. Fill in the blank(s) with the appropriate word(s).