Reznick and Endler were interested in the effects of

__________ on guppy evolution.
a. predation
b. competition
c. population density
d. density-independent factors
e. mating rituals


Answer: a

Biology & Microbiology

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Honey bees use movement in specific patterns (waggle) that convey information about the location of a food source. Which of the following does not accurately describe the waggle dance?

A. The waggle is "danced" by the queen bee. B. Foragers waggle back and forth while moving forward. Then they circle back, repeat the waggle and circle back the other way. C. Distance to the food source is conveyed by a waggle up the middle of the bee's circle. D. If the food source is far away, the bee spends more time waggling up the middle of its circle. E. Finding the food source that is at a 45 degree angle requires that the dancer's "line" be 45? to the left of vertical.

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What is the difference between ex vivo and in vivo gene therapy?

What will be an ideal response?

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The immediate cause of most extinctions is

A) hybridization. B) wide distribution. C) environmental change. D) overspecialization. E) genetic drift.

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What relationship between LDLs and HDLs is the healthiest?

A) high levels of LDLs and low levels of HDLs B) low levels of both HDLs and LDLs C) low levels of LDLs and high levels of HDLs D) high levels of both HDLs and LDLs

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