A population of rabbits increases exponentially until their environment has reached its carrying capacity. Which of the following best describes the cause?
a. Part of the population of rabbits have evolved into a new species that can no longer reproduce with the original species of rabbits.
b. The rabbits have become infertile.
c. The resources necessary to keep all the rabbits alive have run out.
d. The population of rabbits have moved to a new habitat.
c. The resources necessary to keep all the rabbits alive have run out.
When the environment has reached carrying capacity, it means that it no longer has the resources necessary to sustain a specific population of organisms. This also produces an S-shaped population curve.
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The sympathetic nervous system is part of the
A. central nervous system. B. autonomic nervous system. C. somatic nervous system. D. learning and memory system. E. limbic system in the brain mediating emotion.
An example of abiotic factors influencing marine organisms is:
a. predation. b. competition for food. c. parasitism. d. salinity. e. bacterial disease.
What must be destroyed in order to isolate DNA?
What will be an ideal response?
At a chemical synapse, the presynaptic and postsynaptic neurons touch and chemicals are exchanged through gap junctions
Indicate whether the statement is true or false