Terrestrial ecosystems are grouped into biomes primarily on the basis of __________.

Fill in the blank(s) with the appropriate word(s).


Answer: vegetation type

Biology & Microbiology

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What percentage of the species that have inhabited the Earth are extinct?

a. 15% b. 50% c. 35% d. 99% e. 85%

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In a population of rabbits, some evolve the

ability to outrun foxes. This is an example of ____ selection.

a. directional b. stabilizing c. disruptive d. mutational e. restricted

Biology & Microbiology

All of the following are specialized epidermal cells EXCEPT

A. trichomes. B. root hairs. C. guard cells. D. collenchyma.

Biology & Microbiology

Algal blooms often occur when which nutrients accumulate in the water?

A) Mercury and sulfur B) Potassium and sodium C) Copper and iron D) Phosphorous and nitrogen

Biology & Microbiology