Insects have a compound eye with many individual units called ommatidia, each with its own ________.
Fill in the blank(s) with the appropriate word(s).
lens
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Fall leaf color on deciduous trees is a result of
A. the production of more accessory pigments because of the cooler temperatures. B. the reduction in the production of accessory pigments. C. cessation of chlorophyll production, which allows the accessory pigments to be revealed. D. the increased angle of the sun during the fall, which reflects more of the accessory pigments.
Stomatal opening requires each of the following conditions, except
A. expenditure of energy. B. a reduction of turgor in the guard cells. C. water entering the guard cells by osmosis. D. a lower water potential in the guard cells. E. pumping of potassium ions into the guard cells.
The side group (R group) of the amino acid shown above contains which of the following functional
groups?
a. hydroxyl b. carbonyl c. carboxyl d. sulfhydryl e. amino
In the C4 pathway, what is the source of carbon?
A) Carbon dioxide B) Water C) Glucose D) NADPH E) ATP