The science that deals with when diseases occur and how they are transmitted is called
A) ecology.
B) epidemiology.
C) communicable disease.
D) morbidity and mortality.
E) public health.
B
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In a monohybrid cross
(a) only one trait is being considered. (b) the parents are always dominant. (c) the parents are always heterozygous. (d) no hybrid is produced.
The electrons that are passed to NADP+ during noncyclic pathways are emitted by::
a. photosystem I b. hydrogen ions c. glucose d. sunlight e. ATP synthase
As opposed to external fertilization, internal fertilization ensures that
a. sperm and egg will be released simultaneously. b. only the fittest of sperm and egg combinations will survive. c. sperm will be protected until they can unite with the eggs. d. all of the sperm will fertilize eggs. e. the number of sperm and eggs produced will be equal.
What is the difference between a first messenger and a second messenger? Give an example of each. What will be an ideal response?