A soil that is mostly ____ will tend to dry quickly compared to other soil types
a. sand
b. humus
c. clay
d. silt
e. organic matter
ANSWER: a
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A reasonable estimation of the duration of an action potential is
a. approximately five microseconds. b. approximately five milliseconds. c. approximately five centiseconds. d. approximately five seconds. e. approximately five nanoseconds.
During long-term stress, cortisol levels can remain high. What are some of the problems associated with this?
What will be an ideal response?
Density-independent population regulation
A) is usually catastrophic. B) primarily affects large populations. C) may involve disease transmission among individuals of the population. D) results from competition among individuals for available resources.
The primary purpose of homeostasis is to:
a. accept responses to stimuli b. provide unlimited growth within an organism
c. allow unrestricted movement of an organism d. convert an organism to live in a harmful environment e. maintain a constant internal environment