Hypothesis I: A flavin pigment absorbs blue light; this pigment then activates the proton pump.Hypothesis II: When CO2 concentration rises, a membrane receptor inactivates the proton pump.Which hypothesis is supported by the fact that stomata open when exposed to white light, a mixture of all colors of light?
A. Supports both hypothesis I and II.
B. Supports only hypothesis I.
C. Supports only hypothesis II.
D. Supports neither hypothesis.
Answer: B
You might also like to view...
If while investigating spontaneous generation, Pasteur had his laboratory located in a stable
A. the results would, most likely, have supported the idea of spontaneous generation. B. the results would, most likely, have not supported the idea of spontaneous generation. C. this would have had no effect on his results. D. this would have shown his love of horses.
A concept presented by Charles Lyell, called ____, contendsthe geological processes that sculpted Earth’s surface
over long periods of time are exactly the same as the processes observed today
a. catastrophismb. sedimentation c. orthogenesis d. gradualism e. uniformitarianism
The tongue does all of the following except
A) taste food. B) shape food into a ball called a bolus. C) secrete saliva. D) push food into the pharynx.
Which of the following is NOT a characteristic of a genus name?
A) it is usually an adjective. B) it is written before the specific epithet. C) it is always capitalized. D) it is either underlined or in italics. E) it is one of two names used to identify an organism.