The electrons energized in photosystem I pass to ____, which becomes ____
What will be an ideal response?
NADP+, NADPH
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At the doctor's office, you may have noticed that when you are asked to "breathe deeply," your chest rises and falls more dramatically than when you are breathing normally. Why?
A. Your intercostal muscles are being used to expand your chest cavity. B. Your spiracles are being used to expand your chest cavity. C. Your air sacs are being used to expand your chest cavity. D. Your bronchioles are being used to expand your chest cavity.
Genetic divergences may ultimately lead to
a. new variations. b. new species. c. new gene frequencies. d. new competition. e. new alleles
About twelve to twenty-four hours after the previous meal, a person's blood-sugar level normally varies from 60 to 90
milligrams per 100 milliliters of blood, though it may rise to 130 mg/100 ml after meals high in carbohydrates. That the blood-sugar level is maintained within a fairly narrow range despite uneven intake of sugar is due to the body's ability to carry out
a. adaptation. b. inheritance. c. metabolism. d. homeostasis.
e. evolution.The growth hormone is called
a. prolactin. b. adrenalin. c. thyroxine. d. ACTH. e. somatotropin.