The first multicellular organisms probably arose about
A. 1.2 billion years ago.
B. 500 million years ago.
C. two billion years ago.
D. 3.5 billion years ago.
E. six billion years ago.
Answer: A. 1.2 billion years ago.
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The lagging strand is the daughter strand that has its ____ end pointed toward the replication fork and is therefore synthesized ______
A. 3'; in a series of segments B. 3'; continuously C. 5'; in a series of segments D. 5'; continuously E. None of the answer options are correct.
Type I and Type 2 diabetes mellitus have different underlying causes. Type I diabetes is characterized by a loss of the insulin-producing cells of the pancreas, leading to insulin deficiency
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A mutation that changes a normal codon to a stop codon is called a ________ mutation.
A. missense B. silent C. point D. nonsense E. back
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A) voltage-gated channels. B) ligand-gated channels. C) mechanosensitive channels. D) patch clamp-gated channels. E) All of the above are types of gated channels.