The energy source of photosynthesis is
A. oxygen.
B. sunlight.
C. carbon dioxide
D. chlorophyll.
E. glucose
B. sunlight.
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The flow of ____ and the cycling of ____ maintains nature’s organization
a. water; populations b. atoms; energy c. nutrients; water d. energy; materials e. raw materials; water
Differentiate between the following terms: threatened species, endangered species, and extinct species. What will be an ideal response?
Explain the underlying cause and consequences of an individual that develops severe combined immunodeficiency (SCID).
What will be an ideal response?
If K+ can exit the cell through leak channels, why don't they flow out until there are equal concentrations on both sides of the membrane?
A. Chelator molecules trap K+ on the inside of the membrane. B. The negative electrical potential inside the cell creates a force that holds the K+ ions in. C. K+ can act as an enzymatic cofactor, and most K+ ions are bound to cellular enzymes. D. The leak channels allow a very slow leak that cannot keep pace with active import of K+ ions.