The boreal forests of North America are dominated by ____
a. spruce, fir, and pine
b. redwoods and sequoia
c. birch and aspen
d. long-leaf and loblolly pines
e. cedars and junipers
ANSWER: a
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How does a species benefit from engaging in mimicry?
a. Discouraging predators b. Obtaining energy c. Preventing parasites d. Increasing habitat size
During an action potential, the membrane potential ____
a. becomes more negative as sodium enters the cell b. becomes more negative as potassium leaves the cell c. becomes more positive as sodium enters the cell d. becomes more positive as sodium leaves the cell e. remains at -70 mV until threshold is reached
One of two of a ribosome's binding sites for tRNA during translation; The A site holds the tRNA that carries the next amino acid in the polypeptide chain (A stands for aminoacyl tRNA)
What will be an ideal response?
Answer the following questions true (T) or false (F)
1. The structure of DNA allows the molecule to replicate itself. 2. The structure of DNA allows repair of simple damage. 3. DNA polymerase cannot copy point mutations, so they are not passed on from parent cells to daughter cells in cell division.