Which molecules are the most important for a cell to protect from damage if the cell is to stay alive and reproduce?
a. proteins
b. lipids
c. nucleic acids
d. carbohydrates
e. amino acids
ANSWER: c
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Which organism is not a consumer?
(a) killer whale. (b) human. (c) bean plant. (d) fungus.
It's your birthday and you splurge with a big slice of chocolate cake, heavy on the icing. Shortly afterwards, your blood glucose levels rise until an endocrine mechanism (secretion of insulin) counteracts this rise and glucose levels decline. The initial change in blood glucose and insulin response that follows is an example of:
A. physiological constancy. B. diffusion. C. homeostasis. D. positive feedback. E. lack of homeostasis.
Henrietta Lack died of
a. cervical cancer. b. breast cancer. c. polio. d. malaria. e. old age
Which is true of cheese?
A. It is the result of aerobic fermentation. B. It contains lactic acid. C. It is spoiled milk. D. All of the above are correct.