An opening in leaves that functions in the

exchange of gases is called a
a. cuticle.
b. stoma.
c. guard cell.
d. pit.
e. pore.


B

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. All tissues are composed of cells. 2. The capacity to maintain a fairly constant body temperature is a homeostatic process. 3. A community is composed of different populations of animals and plants. 4. A defining characteristic that distinguishes prokaryotic and eukaryotic organisms is the lack of cell structure in one versus the other. 5. The modification of a limb that was used for walking in a pre-existing ancestor to one that is used as a wing for a species today is called proteomics.

Biology & Microbiology

Which of the following best describes the distribution of corn in an agricultural field?

A) uniform B) random C) clumped D) ideal

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Alternation of generations is a means of reproduction by (algae/ciliates/fungi/insects).

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

Biology & Microbiology

Which cells play the greatest role in allergic symptoms?

a. T cells b. monocytes c. plasma cells d. mast cells e. eosinophils

Biology & Microbiology