During a drought on the Galapagos islands, finches with larger beaks were able to crack the large tough seeds produced by plants that survived the dry conditions.  This is an example of ________.

A. stabilizing selection
B. a founder effect
C. directional selection
D. disruptive selection
E. genetic drift


Answer: C

Biology & Microbiology

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PCR is the name of the reaction used to amplify specific sequences of DNA

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The vertebrate central nervous system is a brain and

_________. Fill in the blank(s) with the appropriate word(s).

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During translation, one mRNA molecule is usually "read" by more than one ribosome at a time so that several proteins can be synthesized at one time.

a. true b. false

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Membrane potential will affect the directional movement of

A. glucose (C6H12O6). B. cholesterol. C. oxygen (O2). D. potassium (K+).

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