Why is photorespiration more of a problem for a plant when their stomata are closed?
A. Oxygen, from water in photosystem I, cannot leave the leaf, and competes with carbon dioxide for rubisco's active site.
B. Oxygen, from photosystem I, cannot leave the leaf and causes hypertension to occur in the leaves.
C. Carbon dioxide levels increase from the light reactions, and compete with oxygen for rubisco's active site.
D. Oxygen cannot enter the leaf, blocking normal respiration, so the plants switch to photorespiration.
E. Water is lost when the stomata are open, and is not available to accept electrons from photosystem I.
A. Oxygen, from water in photosystem I, cannot leave the leaf, and competes with carbon dioxide for rubisco's active site.
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An air temperature rise of 10?C will typically ____ evaporation from leaves
a. completely eliminate b. double the rate of c. mostly eliminate d. triple the rate of e. quadruple the rate of
The dinosaurs are thought to have gone extinct due to an asteroid strike. How would this impact on
population growth be described? What will be an ideal response?
You purchase a black dog (B = black, b = brown; B is dominant to b) from a breeder who tells you that the dog is a purebred, and that she will forward its papers to you at a later date
You mate the dog with a brown dog of the same breed. If the dog you purchased was truly a purebred animal, what proportions of colors should you see in the offspring? A) 100% black B) 100% brown C) 50% black, 50% brown D) 25% black, 75% brown E) 75% black, 25% brown