Most flowers are pollinated by which method?
a. wind
b. birds
c. bats
d. water
e. insects
E
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Protobionts are thought to be the first nonliving structures that evolved into living cells. A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is
A. internal compartments that subdivide metabolic functions. B. a boundary membrane that separates external from internal environments. C. the ability to exclude all organic substances. D. the ability to fuse with any other protobiont for reproduction. E. the ability to recognize other protobionts for developmental purposes.
The most sustainable method for limiting human population growth is ____
a. decreasing birth rate b. increasing carrying capacity c. decreasing competition d. increasing death rate
e. exploiting outer spaceWhich zone is inhabited by bottom-feeding catfish, crayfish, aquatic worms, clams, and bacteria?
A) Limnetic B) Benthic C) Pelagic D) Profundal E) Intertidal
A diagnosis of genital herpes is confirmed by the
A) detection of herpesvirus DNA by PCR. B) location of herpetic lesions. C) appearance and size of herpetic lesions. D) appearance of stained tissue specimens. E) binding of fluorescent antibodies.