Mutagenic chemicals that ____ and are incorporated into DNA or RNA during synthesis are called base analogs

a. resemble nucleotides
b. resemble genes
c. resemble amino acids
d. cause deletion mutations
e. cause frameshift mutations


a

Biology & Microbiology

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The simplest cephalization occurs in:

a. earthworms b. planarian flatworms c. jellyfish d. vertebrates e. grasshoppers

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ACTH (adrenocorticotropin hormone)ACTH (adrenocorticotropin hormone)

a. is secreted by the posterior pituitary. b. has target cells in the autonomic nervous system. c. has target cells in the adrenal glands. d. has target cells in the adrenal medulla. e. initiates the autoimmune response

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An excessive increase in the number of erythrocytes is called?

a) anemia b) leukopenia c) leukocytosis d) polycythemia e) neurtopenia

Biology & Microbiology