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
A. true B. false
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The vertebrate central nervous system is a brain and
_________. Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
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
Biology & Microbiology
Membrane potential will affect the directional movement of
A. glucose (C6H12O6). B. cholesterol. C. oxygen (O2). D. potassium (K+).
Biology & Microbiology