The five-toed limb of stem reptiles became
modified into a limb ____ in vertebrates that
followed.
a. suitable for high-speed running
b. suitable for digging
c. suitable for swimming
d. with four fingers and an opposable thumb
e. with all of these
E
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Virion size ranges from
A. 1-40 nm. B. 600-1,000 nm. C. 10-400 nm. D. 1,000-10,000 nm.
The eukaryotic cell organelle that most resembles a bacterial cell is the ________.
A. ribosome B. mitochondrion C. nucleus D. lysosome E. Golgi apparatus
People adopt a vegetarian diet for a variety of reasons. Justify such a diet using the laws of energy and the idea of efficient energy usage
What will be an ideal response?
In a resting neuron, which positively charged ions are more concentrated outside of the cell?
A. calcium B. magnesium C. sodium D. potassium