The profitability of a prey item
A) increases as its handling time (Th) increases.
B) decreases as its search time (Ts) decreases.
C) increases as its energy content (E) decreases.
D) increases as its E/Th increases.
D
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What type of species, if removed from the community, could lead to the collapse of the entire community?
A. Invasive species B. Indicator species C. Keystone species D. Flagship species
Dogs use panting to dissipate excess heat. What part of their brain detects the need for this response and sends the signal to pant?
A. hippocampus B. prefrontal cortex C. amygdala D. hypothalamus
Since the 1970s, approximately 40 new infectious disease agents have been discovered, including SARS, chikungunya and zika. The ability of these agents to spread rapidly and cause global concern is due to all of the following except
A. communities are spreading into rural areas/wildlife habitats. B. individuals are traveling more frequently and farther distances than in the previous half-century. C. communities are becoming more sparsely populated. D. communities are becoming more densely populated.
The head of a sperm is covered by the ________, which contains enzymes that help penetrate the layers of cells surrounding the egg
Fill in the blank(s) with correct word