Which factor does a virus not rely on its host cells for?
a. Food
b. Organelles
c. Materials
d. Energy
a
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The two amino acids depicted above both have side groups (R groups) that are
a. acidic and polar. b. uncharged and nonpolar. c. basic and polar. d. positively and negatively charged and nonpolar. e. uncharged and polar.
Using today’s genetic technology, it is possible to select ____________________ for specific traitsFill in the blank(s) with the appropriate word(s)
An example of homoplastic structures is the wing of a butterfly and:a
the wing of a moth. b. the wing of a bird. c. the antenna of the butterfly. d. the legs of the butterfly. e. the antenna of a moth.
One hypothesis proposes that an asteroid impact at the end of the ___________ led to the extinction of dinosaurs.
Fill in the blank(s) with the appropriate word(s).