Which description best fits that of an open circulatory system?
A. The heart pumps blood across gills and then into tissue spaces that are enlarged into saclike sinuses.
B. Gases diffuse across a cutaneous membrane and then move into tissue spaces that are enlarged into saclike sinuses.
C. The heart pumps hemolymph into tissue spaces that route the fluid across the gills for gas exchange.
D. The heart pumps hemolymph into tissue spaces that are enlarged into saclike sinuses.
Answer: D
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When an enzyme has an allosteric activator, it means that
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When the predator population is above the prey isocline, the prey population is
a. increasing b. decreasing c. neither increasing nor decreasing
Energy is stored in what three forms:
What will be an ideal response?