When bass were removed from a stream, an algal bloom occurred. This is an example of
A) top-down control.
B) bottom-up control.
C) the null model.
D) apparent competition.
A
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Which regulatory mechanism does NOT depend on a conformational change in protein/enzyme structure to change activity?
A) attenuation B) catabolite repression C) feedback inhibition D) negative control
Why is haplotype diversity greatest in Africa?
A. Human populations that migrated only took a subset of the variable human haplotypes. B. African populations had a greater mutation rate. C. Migrating populations had less recombination. D. Populations migrated to better environments where there was a lower mutation rate. E. Most migrating populations died out.
Which term(s) refer(s) to bacterial morphology?
A. Bacillus B. Coccus C. Polyhedral D. Coccus AND Bacillus
In roots auxins tend to ________ cell elongation, in stems they promote cell elongation.
A. have little effect on B. promote C. not be a factor in D. inhibit E. not influence