At the global level, the biggest environmental problem we currently face concerns
a. multicropping different crops in a single agricultural plot
b. diseases attacking domesticated fowl and mammals
c. increasing population growth among developing countries
d. climate change
e. so-called "environmentally friendly" but destructive technological approaches to meeting food demands
d
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Social stratification means _________
Fill in the blank(s) with correct word
Which two primary schools of classification are discussed in the text?
a. generalized and specialized b. organic and inorganic c. evolutionary systematics and cladistics d. cladistics and non-cladistics e. ancestral and derived (modified)
The terms Sivapithecus, Proconsul, and Dryopithecus¸ applied to different groups of Miocene hominoids, refer to a distinction made at what taxonomic level?
a. species b. genus c. subfamily d. family e. order
Two people (BOTH heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their children would be expected to have the ability to taste PTC?
a. 3/4 b. 1/2 c. All d. 1/4 e. 2/3