Multiple layers of vegetation, ranging from shade-tolerant undergrowth to towering sun-loving canopy trees, are characteristic of
A) tallgrass prairies.
B) savannas.
C) deserts.
D) tropical rain forests.
E) chaparrals.
D
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During the clonal production of appropriate B cells, what two types of cells are produced? What are their respective functions?
What will be an ideal response?
Given the same total area, studies have shown that which of the following types of preserves would be most effective in maintaining metapopulations of endangered species?
1.a large habitat patch 2.several small habitat patches 3.clusters of separate preserves connected by corridors 4.All of these are equally effective.
Choose the letter of the best match from the following:A. Abscisic acidB. TrichomesC. AquaporinD. EndodermisE. StomaPore in leaves that regulates gas exchange.
Fill in the blank(s) with the appropriate word(s).
Which of the following choices lists the organs of the human alimentary canal in the CORRECT order?
A) pharynx, oral cavity, esophagus, stomach, large intestine B) oral cavity, pharynx, esophagus, stomach, small intestine, large intestine C) esophagus, pharynx, stomach, large intestine, small intestine D) oral cavity, esophagus, stomach, large intestine, small intestine