Dissolved oxygen would be expected to be highest in which of these bodies of water?
a. warm eutrophic lake
b. slow-moving tropical river
c. pool within a cool forest stream
d. white water stretch of a cold river
e. dissolved oxygen should be the same in all waters
D
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Where is the organ of Corti located?
A. in the cochlear duct B. in the upper canal of the cochlea C. in the lower canal of the cochlea D. in the semicircular canals
Which factors contribute most to intraspecific competition?
A. a species' rate of reproduction and the carrying capacity of the environment B. predation and parasitism C. mutualistic relationships D. a species' fundamental niche and abiotic surroundings E. increased diversity of adaptations and resource partitioning.
Eukaryotic cells can regulate large sets of genes together by:
A. regulating ribosomal protein pre-mRNA splicing in the nucleus. B. controlling mRNA stability. C. controlling translational efficiency. D. All of the choices are correct.
The endosymbiotic theory has been developed to explain the emergence of ________.
A. prokaryotes B. viruses C. eukaryotes D. archaea E. bacteria