What biome has the highest rate of primary productivity?

a. savanna
b. tundra
c. algal beds and reefs
d. temperate grassland
e. tropical rain forest


C

Biology & Microbiology

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Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?  

A.  This is the only place in the cell where the cyclins and Cdks are located. B.  If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase. C.  This is the location where the chromosomes can become attached to the spindle microtubules. D.  This allows asters to form. E.  This allows sister chromatids to form.

Biology & Microbiology

Allelochemicals are active in preventing

(a) herbivore feeding. (b) germination of plant competitors. (c) infection by pathogens. (d) all of the above.

Biology & Microbiology

Which of the following characteristics do fungi share with plants?

a. Their cell walls both use cellulose to keep their structure. b. They both have chloroplasts. c. Their cells both have cell walls. d. Their plasma membranes are both stabilized by ergosterol.

Biology & Microbiology

Which of the followings substance is NOT

secreted by an exocrine gland?

a. mucus b. hormones c. tears d. earwax e. digestive enzymes

Biology & Microbiology