Regulation of sodium and potassium levels are the function of the ____________
Fill in the blank(s) with the appropriate word(s).
Answer : adrenal glands
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Erwin Chargaff showed that DNA that has 30% adenine has ________ thymine.
A) 20% B) 30% C) 60% D) 40%
The respiratory centers that control ventilation of the lungs in mammals are located in the
A. brainstem. B. bronchi. C. hypothalamus. D. neck. E. cerebral cortex.
Which of the following is false about polar bears and
cold stress? a. They have coarse, hollow guard hairs in their coats, allowing them to shed water quickly. b. Brown adipose tissue insulates and generates metabolic heat. c. They hibernate during the long, cold, arctic winter. d. Thick, soft underhair traps heat. e. Close bodily contact between mother and cubs helps to reduce heat loss.
How does the site of aerobic respiration in a cell compare with the site of anaerobic respiration?
A Both aerobic and anaerobic respiration occur in the cytoplasm. B Both aerobic and anaerobic respiration occur in the mitochondria. C Aerobic respiration occurs in the mitochondria, while anaerobic respiration occurs in the cytoplasm. D Aerobic respiration occurs in the cytoplasm, while anaerobic respiration occurs in the mitochondria.