Photoreceptors are found in the
(a) lens.
(b) ciliary body.
(c) iris.
(d) retina.
(d) retina.
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Which of the following cause stomata to close? (Select all correct answer options.)
A. abscisic acid B. water loss C. sunlight D. low CO2 in the leaf
Which of the following describes an organelle?
a. A membrane-bound sac within a cell b. A structure made of tissues operating together c. A group of similar cells carrying out the same function d. An individual living entity
The ABO blood types have __________ different
genotypes. a. 4 b. 6 c. 8 d. 12 e. 16
In an active state of a G protein
a. the ? subunit binds to a target protein and the ?? subunit remains bound to the receptor. b. the ? and ?? subunits both can bind to target proteins. c. the ?? and ? subunits both can bind to target proteins. d. the ? subunit can bind to a target protein and the ?? subunit remains bound to the receptor.