Olfaction is the sense of
A. smell.
B. hearing.
C. taste.
D. vision.
E. touch.
A. smell.
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The receptors for a group of peptide signaling molecules known as growth factors are typically ____
a. receptor tyrosine kinases b. cyclic AMP c. neurotransmitters d. G protein-linked receptors e. ligand-gated ion channels
Which of the following choices represents an informal grouping of anaerobic chemoautotrophs that form ATP by removing electrons from hydrogen gas or acetate?
a. extreme thermophiles b. extreme halophiles c. acidophiles d. methanogens
Which type of plant hormone has been shown to both promote pollen tube elongation and inhibit root
elongation?
a. jasmonates b. ethylene c. brassinosteroids d. salicylic acid e. oligosaccharins
What does the tympanic membrane function for?
What will be an ideal response?