Compared with plants growing in shade, plants growing in sunlight tend to have smaller

A) stems.
B) roots.
C) leaves.
D) flowers.


C

Biology & Microbiology

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Variation that approximates a bell-shaped curve when plotted on a bar graph is

a. undergoing disruptive selection. b. undergoing stabilizing selection. c. quantitative variation. d. qualitative variation. e. in genetic equilibrium.

Biology & Microbiology

How long did it take in the history of life on Earth to go from the first prokaryotic cells to the first eukaryotic cells?

A. 1,000 years B. 1 million years C. 100,000 years D. Over a billion years

Biology & Microbiology

The commercial livestock industry has significantly increased _______ levels in the atmosphere because of animal respiration.

a. carbon monoxide b. carbon dioxide c. calcium carbonate d. carbonic acid

Biology & Microbiology

There is an ozone "hole" over:

a. the Northeastern United States b. Western Europe c. Antarctica d. Central America e. North Africa

Biology & Microbiology