The number of individuals of a species that can be sustained by the resources in a given area defines
a. the carrying capacity of the environment.
b. exponential growth.
c. the doubling time of a population.
d. density-independent factors.
e. the biotic potential.
A
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Ambient air, which contains 21% oxygen (O2) and a small amount (0.03%) of carbon dioxide (CO2), is the environmental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
Wound healing can be slowed by the presence of
A. normal microbiota. B. antiseptic ointments. C. sweat. D. foreign matter.
The function of adenylyl cyclase is to:
A. cleave PIP2 into DAG and IP3. B. stimulate the release of calcium from the endoplasmic reticulum. C. catalyze the conversion of ATP to cAMP. D. directly activate protein kinase A (PKA).
A key is placed into a keyhole then turned and the door opens. When considering the components of cell signaling, the action of turning the key would best correspond to
A. the binding site of the receptor. B. signal transduction that occurs when the receptor binds the hormone. C. the concentration of the hormone. D. the cell response that occurs when the receptor binds the hormone. E. conformational change in the receptor once bound to the hormone.