Select the reaction that is most likely to be a tropism.
A. Flowers blooming when it is warm.
B. Production of aerenchyma.
C. Plants bending away from a heat source.
D. Induction of seed dormancy.
C. Plants bending away from a heat source.
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What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?
A) full-spectrum white light B) green light C) a mixture of blue and red light D) yellow light E) UV light
Which structure in the accompanying figure is responsible for allowing entire regions of cells to respond to a single
stimulus?
a. A b. B c. C d. D e. E
Letter ____ can indicate a fruit or developing root cells
a. A b. B c. C d. D e. E
Part of the reason for the charge difference inside and outside a neuron's membrane is:
A) positively charged proteins outside the membrane. B) positively charged proteins inside the membrane. C) excess potassium outside the membrane. D) excess sodium inside the membrane. E) negatively charged proteins inside the membrane.