Conservation through restoration involves ____
a. completely excluding people
b. people allowed only as temporary visitors
c. some human residents and livestock grazing
d. limited livestock grazing
e. efforts to remove contaminants and other unnatural obstructions
ANSWER: e
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For acid rainwater, which has a pH as low as 3.0, which of the following is true?
a. [H+] < [OH?] b. [H+] = [OH?] c. [H+] = 0 d. [OH?] = 0 e. [H+] > [OH?]
Water enters the water vascular system of echinoderms through the:
a. spines. b. mouth. c. madreporite. d. tubercle. e. tube feet.
Turgor is the
A. pressure placed on the inside of a cell membrane of a plant by water. B. cohesion of water molecules with each other, as they pass through a plant's vascular tissues. C. diffusion of water across plant cell membranes in response to the nutrient solute concentrations. D. passage of water vapor out of a plant through the stomatal openings. E. adhesion of water molecules to the inside of a cell membrane of a plant's xylem.
A study of a cohort of 1,000 animals showed a
90 percent death rate per individual in the first year, 10 percent the second year, and 5 percent the third year. This population's survivorship is a. type I. b. type II. c. type III. d. type I the first year and type II in years two and three. e. type I the first year, type II the second year, and type III the third year