The number of individuals of the same species in some specified area or volume of habitat is the ____
a. population density
b. population growth
c. population birth rate
d. population size
e. carrying capacity
ANSWER: a
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In a reflex arc, the correct sequence of cell types through which an electrical signal would pass would be
A. motor neuron ? sensory neuron ? interneuron in the PNS B. sensory neuron ? interneuron in the CNS ? motor neuron C. sensory neuron ? motor neuron ? interneuron in the CNS D. motor neuron ? interneuron in the PNS ? sensory neuron
The range of conditions and resources required by a population is known as its ____, while the range of conditions and
resources that it actually uses is known as its ____.
a. fundamental niche; habitat b. trophic level; habitat c. realized niche; fundamental niche d. fundamental niche; realized niche e. ecological niche; trophic level
Larval oysters attach themselves to:
a. They do not have specific requirements. b. any available solid substrate. c. other oyster shells. d. both b and c e. sand.
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
A. because electrons cannot float in the matrix. B. to separate the ATP from the ADP. C. because NADH cannot localize to the mitochondrial matrix. D. to generate and maintain the proton gradient essential for ATP production.