Which reproductive isolation mechanism is defined by the prevention of genetic exchange between two species because
they reproduce at different times of the day or year?
a. diurnal isolation
b. sexual isolation
c. annual isolation
d. temporal isolation
e. mechanical isolation
d
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Mycorrhizal fungi interact with plants at the
A. stomata. B. seed coat. C. roots. D. edge of ponds. E. cuticle.
Photosynthetic prokaryotes that use light energy to build organic compounds from carbon dioxide and water display which of the following modes of nutrition?
a. chemoheterotrophic b. chemoautotrophic c. photoheterotrophic d. photoautotrophic
Where are most glucose transporter proteins ("GLUTs") located when levels of the hormone insulin are LOW?
A. inserted into the nuclear membrane B. inserted into the plasma membrane C. in the membranes of intracellular vesicles D. in the endoplasmic reticulum E. in the liver-they are transported to other cells when glucose levels rise.
Feedback inhibition is:
a. transcriptional control. b. transcriptional control. c. a mechanism affecting events after translation. d. a repressible system. e. constitiutive control