Mitochondria transfer ________ energy from ________ to ATP; chloroplasts transform ________ energy into the chemical energy of ATP.
A) chemical . . . food . . . light
B) nuclear . . . light . . . food
C) food . . . light . . . chemical
D) food . . . light . . . nuclear
E) light . . . food . . . kinetic
Answer: A) chemical . . . food . . . light
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Natural selection acts at the level of the
a. population b. individual c. gene
When a B cell contacts a foreign or abnormal antigen, it develops into a ________ that releases ________.
A) macrophage : histamine B) macrophage : antibodies C) plasma cell : histamine D) natural killer cell : antibodies E) plasma cell : antibodies
Suppose the template DNA strand of a "mini-gene" has the base sequence TACCCGGATTCA. The anticodon of the tRNA that carries the first amino acid to the ribosome will be
A) AGU. B) UAG. C) AUG. D) UCA. E) UAC.
_______ are the simplest animals, being little more than tubes of cells that filter microscopic pieces of food from the water.
a) chordates b) nematodes c) cnidarians d) sponges