Puppies born too large experience difficulties during birthing and tend to have respiratory and other problems. Puppies born too small often can’t compete with their siblings for their mother’s milk. Thus, puppies of intermediate size have a survival advantage. This is an example of ____ selection.
a. directional
b. stabilizing
c. disruptive
d. frequency
e. allelic
ANSWER: b
Biology & Microbiology
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