An estuary is:
a. an area where freshwater mixes with ocean water
b. a portion of ocean cut off from the rest.
c. an area separated by natural or artificial dams.
d. a very stable environment.
a
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Apply what you know about the fundamental niche and the realized niche. How does this apply to the human species? Does competitive exclusion appear to apply to us?
What will be an ideal response?
The transition from the gametophyte into the sporophyte generation occurs at the point in Figure 27-2 labeled:
a. 1.
b. 4.
c. 6.
d. 8.
e. 9.
When amino acid tryptophan is readily available on the growth media, bacteria do not have to synthesize this molecule. Genes controlling this mechanism are under control of
A. A reproducible operon B. An inducible operon C. Catabolic repression D. Global regulation E. A repressible operon
The essential amino acids
A) must be obtained from the food we eat. B) are found only in green, leafy vegetables. C) are essential as an energy source. D) are required for making nucleic acids.