Which of the following is considered a nonlethal effect of predation?
A) reduced activity of prey
B) prey consumption
C) reduced competition
D) increased predator mortality
A
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Which of the following research questions would a population geneticist be likely to ask?
A. How much genetic variability is found in sperm whales? B. How can we explain the amount of genetic diversity in Adelie penguins? C. Why do some species have more genetic diversity than others? D. All of the above are questions a population geneticist may ask.
Which reproductive isolating mechanism is displayed in a mule, the product of a cross between a horse and a donkey?
a. mechanical isolation b. hybrid inviability c. hybrid sterility d. hybrid breakdown e. temporal isolation
The appearance of gram-negative bacteria after addition of the mordant in the Gram stain.
a. Purple b. Red c. Colorless d. Brown
A retrovirus uses ________ to make a DNA copy of RNA
A) ras proteins B) CDKs C) cyclins D) reverse transcriptase