Answer the following statements true (T) or false (F)
1.The leaf-cutting ant is an example of an organism involved in nutrient cycling.
2.Air pollution in the lower atmosphere characterized by a visible haze is called a fog.
3.Many environmentalists believe that reducing human population growth could improve environmental issues.
4.Melting of ice from sources on land (glaciers) raises sea levels.
5.Alpine chipmunks have moved to higher elevations in the last century as temperatures at Yellowstone have climbed.
1.TRUE
2.FALSE
3.TRUE
4.TRUE
5.TRUE
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The cornea is part of the
(a) sclera. (b) choroid. (c) retina. (d) lens.
Population dispersion is the ____
a. statistical description of the relative numbers of individuals in each age class b. number of individuals per unit area
c. number of individuals in a population d. average time between the birth of an organism and the birth of its offspring e. spatial distribution of individuals within a geographical range
You have severe itching problems when bitten by an insect. Your friend gives you an ointment to spread on your skin around the bite so that the redness and itching do not bother you. The likely mechanism of this medication would be
A. the inactivation of neutrophils. B. to act as an antagonist of histamine. C. the destruction of phagocytic cells. D. the inhibition of lysozyme.
No fishes survive when the oxygen content of water falls below ___________________.
Fill in the blank(s) with the appropriate word(s).