H2S and NH3 may be used by some prokaryotes as energy sources
Indicate whether this statement is true or false.
TRUE
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Prezygotic mechanisms lead to reproductive isolation by preventing the formation of
A. mating pairs. B. fertile eggs. C. fertile sperm or pollen cells. D. somatic cells. E. hybrid zygotes.
Unexpected phenotypes can be the result of
a. altered metabolic pathways. b. a gene mutating in different ways in different individuals. c. an environmental effect during development. d. a post-developmental environmental effect. e. any of these
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.
In the event that you are trying to explain the variation in Y using the variables X and Z in a linear regression, the multiple regression line would be given by which of the following?
A. Y = b + m1X + m2Z B. Y = b + m1X C. Y = b + m1Z D. Y = b + m1X and Y = b + m1Z