Anabolic-androgenic steroids
a. are synthetic forms of testosterone.
b. are synthetic forms of estrogens.
c. are used for treating early puberty.
d. are natural variants of testosterone.
e. are natural variants of estrogen.
A
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The perception of a certain pitch of sound depends partly on which of the following?
A. the amplitude of the sound waves B. which bones of the middle ear are moved C. which hair cells of the cochlea are stimulated D. where particles settle in the semicircular canals E. whether it is the round window or oval window that vibrates
The above figure is a photograph of
a. a plant with root nodules. b. mycorrhizae. c. root hairs. d. a demonstration of the effect of mutualistic Rhizobium. e. a microscopic view of a nodule forming around area where the bacterium infect.
Humans belong to which class of animals?
A) Bacteria B) Archaea C) Eukarya D) vertebrates
What does this figure suggest?
A) Larger patch size increases extinction risk. B) Larger number of patches increase extinction risk. C) Smaller patch size increases extinction risk. D) Smaller number of patches increase extinction risk.