Primary growth in roots originates from ____

a. dermal cells
b. vascular cells
c. apical meristems
d. lateral meristems
e. the pericycle


ANSWER: c

Biology & Microbiology

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Which of the following does NOT provide new genetic combinations?

A) Random fertilization B) Cytokinesis C) Independent assortment D) Crossing over

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Knockout experiments involving __________ genes in fruit flies (Drosophila melanogaster) revealed local controls

over gene expression. Fill in the blank(s) with the appropriate word(s).

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Generation of proton gradients across membranes occurs during

A) photosynthesis. B) respiration. C) both photosynthesis and respiration. D) neither photosynthesis nor respiration. E) photorespiration.

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What nucleotide sequence would be found on the complementary DNA strand of the strand shown here?


A) ACTGT
B) UGAGA
C) TGACA
D) TGUGU

Biology & Microbiology