Which of the following is an example of a positive feedback loop?
A) A hummingbird maintaining a constant internal body temperature
B) Stress altering the normal menstrual cycle, which delays menstruation, thereby causing more stress
C) A person altering her breathing rate to keep blood pH between 7.35 and 7.45
D) The kidney retaining water when the organism becomes dehydrated
B
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Bakers use alcoholic fermentation to produce
__________ which causes the dough to rise. c. alcohol d. ATP c. butyric acid d. carbon dioxide e. none of these
Differential reproductive success is equivalent to:
a. evolution. b. competition. c. mutation. d. natural selection. e. adaptation.
When RNA is transcribed, the RNA/DNA complex extends for the entire length of the DNA sequence of interest.
a. true b. false
The "fundamental niche" of an organism is defined as the
a) climatic conditions required for the organism to survive and reproduce b) range of environmental conditions under which the organism can survive and reproduce c) area that an organism occupies immediately after birth d) physical space that the organism occupies e) area in which the organism reproduces