Tariff protection

a. encourages the optimum use of scarce resources.
b. has no impact on use of scarce resources.
c. prevents the optimum use of scarce resources.
d. eliminates the scarcity of resources.


c. prevents the optimum use of scarce resources.

Biology & Microbiology

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solution consists of a ________ which dissolves the ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which of the following statements about regulation of thyroid hormones is true?

a) TSH positively feeds back on the hypothalamus causing TRH release b) T3 and T4 negatively feed back on the pituitary to reduce TSH release c) T3 and T4 negatively feed back on the pituitary to reduce TRH release d) TSH negatively feeds back on the hypothalamus to reduce TRH release e) Both b and d are true

Biology & Microbiology

Which structures make up the male reproductive whorl of a flower?

a. the sepals b. the carpels c. the stamens d. the receptacles

Biology & Microbiology

If the researchers are correct, the X chromosomes likely cross over at the locus that controls normal or barred eyes.

a. true b. false

Biology & Microbiology