When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Auxin absorbs mostly far-red light.
B. Shade is enriched in far-red wavelengths of light.
C. Phytochrome in the taller plant absorbs most of the red light.
D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed.
E. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll.
Answer: E
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A. defined B. selective C. enrichment D. transport
The chemical bonds of carbohydrates and lipids have high potential energy because:
A. they are strong oxidizing agents. B. they are strong reducing agents. C. their electrons are far away from the nuclei of the atoms. D. they are easy to phosphorylate. E. they are easy to hydrolyze.
Describe and give the general function of the digestive tract.
What will be an ideal response?
Girdling is the process by which bark is removed from the entire circumference of a tree or branch. This is lethal to a
tree because it prevents ____.
a. water uptake b. photosynthesis c. respiration d. sugar transport to roots e. water transport to leaves