In covalent bonds, ____.
A. atoms share electrons
B. atoms give up electrons
C. atoms accept electrons
D. electrons cannot be shared equally
E. electrons are always shared equally
Answer: A
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Consider a mutation that occurs in the gene for the progesterone receptor so it no longer can bind progesterone. What would be the effect of such a mutation?
A. The uterine lining would be maintained throughout the menstrual cycle. B. The uterine lining would not increase to a level able to support pregnancy. C. The uterine lining would be shed continuously. D. The uterine lining would be shed as usual throughout the menstrual cycle.
Humans with mutations in the gene encoding AQP1 (aquaporin-1) that cause the absence of AQP1are
characterized by an inability to ____.
a. concentrate urine despite prolonged thirsting d. control sweating b. control edema e. salivate c. make large volumes of dilute urine
Some evidence that algae are the closest relatives to plants is that they both
A. have chloroplasts. B. contain chlorophyll a. C. have cellulose-rich cell walls. D. use starch as a nutrient reserve. E. All of the answer choices are correct.
A patient has a leg wound that is seeping and emitting a strong odor. The doctor suspects Clostridium bacteria may be present. What type of staining procedure might be used?
A) simple stain B) spore stain C) negative stain D) acid-fast stain