If 1 cc of a substance has a mass of 1.5 g, its density is
(a) 0.67.
(b) 1.0.
(c) 1.5.
(d) 2.5.
(c) 1.5.
Biology & Microbiology
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On occasion, a stressful factor such as disease, starvation, or drought kills a large proportion of the individuals in a
population, producing ____ that dramatically reduces the population size.
a. natural selection b. artificial selection c. a lethal mutation d. a founder effect e. a population bottleneck
Biology & Microbiology
Figure "B" in the above pair is a
a. cotyledon. b. petiole. c. dicot; evergreen. d. veins.
Biology & Microbiology
Electromagnetic radiation is used in the lab to mutagenize bacteria. Which type of wavelength do you think is used for this purpose?
A) Gamma rays and X rays B) Ultraviolet light C) Visible light D) Infrared light
Biology & Microbiology
Which proteins are likely to act as gene activators?
(a) G (b) H (c) J (d) both H and J
Biology & Microbiology