According to researchers Parmesan and Yohe, how are living systems responding to anthropogenic
global warming?
a. All biomes are remaining intact and all are shifting their distributions northward.
b. Some species are moving northward and others are not, so communities are being
disrupted.
c. All biomes are remaining intact, but some biomes are shifting their distributions and other
biomes are not.
d. Most plants are shifting their distributions northward, but most animals are not.
e. Most animals are shifting their distributions northward, but most plants are not.
B
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Escherichia coli is found naturally in the intestines of birds, humans, and animals
Indicate whether the statement is true or false.
Activated complement proteins
a. produce antigens. b. destroy invading cells. c. mark invading cells for phagocytosis. d. bind to antibodies. e. do more than one of these things
Hydrogen bonding is strongest between ____
a. adenine and guanine b. uracil and thymine c. guanine and uracil d. adenine and thymine e. cytosine and guanine
During the elongation of a polypeptide chain, ________ occurs when the mRNA moves to the next site on the ribosome to read the next codon.
A. translocation B. transference C. translation D. transcription