What happens when the level of thyroxin rises in the blood? A. The pituitary gland releases thyroid-stimulating hormone.
B. The thyroid gland starts releasing more hormones.
C. The level of TSH in the blood falls.
D. two of the above
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Do you think humans have a moral obligation to preserve the habitat of the chimpanzee

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.

Besides regulating what enters and leaves the cell, what is another function of your choice from question #1?