Mutagenesis ____
a. is an example of spontaneous mutation
b. acts directly on proteins by causing them to unfold
c. occurs due to a single mRNA being translated by too many ribosomes simultaneously
d. is the production of mutations in a laboratory by exposure of a living organism to a mutagen
e. occurs when errors made by DNA polymerase are not repaired
ANSWER: d
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Structures in an organism that are reduced in size, complexity or strength compared to related
organisms and have no current function are called
a. homologous b. vestigial c. mutualistic d. fossil e. convergent
If its cells are striated and abut at the ends so that the cells contract as a unit, the tissue is
a. smooth muscle. b. dense fibrous connective. c. supportive connective. d. cardiac muscle. e. hyaline cartilage.
Shark brains are encased in dermatocranium
a. true b. false