Which of the following does NOT give rise to
brain tumors?
a. neurons
b. neuroglia
c. epithelial cells in the meninges
d. epithelial cells in the pituitary glands
e. all of these can give rise to brain tumors
A
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Activators and inhibitors that bind to enzymes at positions other than the active site of the enzyme bind to a(n) ____ site on the enzyme
Fill in the blank with the appropriate word.
Organisms capable of producing their own food are known as
a. autotrophs. b. heterotrophs. c. omnivores. d. Herbivores.
Which sentence describes the relationship between sporophyte and gametophyte in the fern life cycle?
a. Gametophytes are photosynthetic and partially independent from the sporophytes. b. Both gametophytes and sporophytes are totally independent from each other and are equally dominant. c. Sporophytes originate within and are dependent upon gametophytes. d. Gametophytes are free living and photosynthetic, but are replaced by a dominant sporophyte generation.
Peptide hormones, amino acid-derived hormones, and steroid hormones are types of
A) hormone receptors. B) neurotransmitters. C) endocrine hormones. D) paracrine hormones. E) local hormones.