A species that plays a major role in determining the structure of its ecological community is
A) a predator.
B) a keystone species.
C) a dominator species.
D) the species with the largest size.
E) the most abundant species in the community.
B
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It is not necessary to define the type of data in a field because the DBMS will do it for you.
Indicate whether the statement is true or false.
The equation A-PO4 + B ? A + B-PO4 would be catalyzed by which of the following classes of enzymes?
A) transferases B) oxidoreductases C) hydrolases D) ligases E) isomerases
What animal group is mismatched with its circulation system type (open or closed)?
A. earthworm—closed B. lobster—open C. killer whale—closed D. cricket—closed E. oyster—open
The term "respiration" in animals refers to the ____.
A. movement of oxygen into an animal only B. movement of carbon dioxide out of an animal only C. movement of oxygen into an animal and the movement of carbon dioxide out of the animal D. binding of oxygen to hemoglobin molecules in the blood E. diffusion of oxygen across a cell membrane