Altricial young are relatively
A) independent at birth and require relatively little time for incubation and gestation.
B) independent at birth and require a relatively long time for incubation and gestation.
C) helpless at birth and require relatively little time for incubation and gestation.
D) helpless at birth and require a relatively long time for incubation and gestation.
C
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Fill in the blank(s) with correct word
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A. spiracle B. glottis C. operculum D. trachea E. jaw bone
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