One disadvantage of a simulation model of an ecosystem is that it ____
a. does not take into effect interactions between organisms
b. does not take into effect nutrient availability
c. does not take into effect water availability
d. may not be accurate
e. may predict disastrous consequences
ANSWER: d
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What will be an ideal response?
Egg laying is a character unique to which groups of animals and their ancestors?
A. birds B. mammals C. reptiles D. All of the answer options are correct.
The E. coli lac operon encodes three genes. These genes
a. cleave lactose into glucose and galactose, produce transacetylase, and actively transport lactose into the cell. b. encode for an enzyme that cleaves glucose, a transport protein for active transport, and a transacetylase enzyme for solubilizing lactose in the cytosol. c. encode for an enzyme that cleaves lactose, a transport protein for active transport of lactose, and a transacetylase enzyme whose function is still unknown. d. catalyze the synthesis of lactose from glucose and galactose, produce transacetylase, and actively export lactose from the cell. e. directly interact with the lac repressor and initiate their own transcription.
What method is often used by cells to move large solid material into the cell?
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