A substance that in some way harms the health, activities or survival of a population is a(n)
a. pollutant.
b. nonrenewable resource.
c. ecological footprint.
d. reservoir.
e. limiting factor.
A
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Which number identifies a regulatory sequence that can increase the rate of transcription?
a. 1 b. 3 c. 4 d. 5 e. 6
DNA is present in all of the following human cell types except ________
A) skin cells B) erythrocytes (mature red blood cells) C) leukocytes (white blood cells) D) hair E) buccal (cheek) cells
In which of the following groups are most mRNAs monocistronic?
A) bacteria B) archaea C) eukarya D) bacteria and archaea E) All mRNAs are monocistronic.
PP =purple, Pp =purple, pp =white. The offspring of a cross between two heterozygous purple-flowering plants (PP x PP) results in
A. all purple-flowered plants. B. ''purple-flowered plants and white-flowered plants. C. two types of white-flowered plants: PP and Pp. D. all white-flowered plants. E. all pink-flowered plants