A climax community is ____
a. relatively stable
b. a result of primary succession only
c. a result of secondary succession only
d. defined by high species diversity
e. dominated by r-selected species
ANSWER: a
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When a neuron membrane potential becomes less negative it becomes
a. depolarized. b. hyperpolarized. c. repolarized. d. damaged. e. activated above the threshold potential.
Body weight is related to
a. caloric intake. b. energy utilization. c. genes. d. age and sex. e. all of these.
The Mesozoic era is often called the age of:
a. amphibians. b. fish. c. mammals. d. conifers. e. reptiles
Monoclonal antibodies ________
A) are fairly non-specific B) have not yet been approved by the FDA C) have not been found to treat any disorders D) are produced from myeloma cells only E) are highly specific to a particular antigen