A survivorship curve shows
a. the number of individuals surviving to a particular age.
b. the cause of death of an individual.
c. the place an organism exists in its environment.
d. the organism's trophic level.
c
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During embryonic development, animal cells must divide and differentiation to determine what?
a. morphology and anatomy b. anatomy and physiology c. morphology and physiology d. analogy and homology
Which species of wheat has six sets of chromosomes
in relation to the original wheat species? a. A b. B c. C d. D e. E
The best definition of population density is the number of individuals:a
of all species in a given area. b. of one species in a given area. c. in a given area at a given time. d. of all species in a given area at a given time. e. of one species in a given area at a given time.
Which of the following statements is TRUE concerning diphtheria?
A) No effective vaccine is available to prevent infection. B) A diffuse rash is the major sign of diphtheria. C) The signs and symptoms of the disease are directly caused by a bacterial toxin. D) The pseudomembrane is easily removed by surgery. E) A microscopic exam of bacterial samples is sufficient for conclusive diagnosis.