Elephants are killed for their tusks and rhinos for their horns. This is an example of __________ for traditional
medicine and ornaments. Fill in the blank(s) with the appropriate word(s).
ANSWER: overharvesting
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In general, control groups should be ________
a. older than the experimental group b. more fit than the experimental group c. more diverse than the experimental group d. as similar as possible to the experimental group
Why are tropical waters so blue?
a. Higher density of water b. Large bacteria populations c. High mineral content d. Low primary productivity
Cloned fragments of all of the DNA in a haploid
number of chromosomes characterizing a species is a a. cDNA library. b. transcribed DNA library. c. genomic library. d. gene library. e. plasmid library.
In males, the primary source of estrogens is the ________
A) hypothalamus B) heart C) adrenal cortex D) ovaries