The birth control pill is a mixture of synthetic ____
a. testosterone and estrogens
b. progesterone and estrogens
c. LH and FSH
d. LH and estrogens
e. progesterone and testosterone
ANSWER: b
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Under normal circumstances, the microbiota of the skin is kept in check by
A. a pH above 8. B. excessive moisture. C. phagocytic activity. D. a slightly acidic pH.
How did Theodor Engelmann determine which colors of light were used in photosynthesis?
What will be an ideal response?
Biologists sometimes damage ecosystems in order to study them. For example, researchers have
fogged rainforest trees with insecticides to search for undiscovered species that fall to the ground when poisoned. Others have deliberately added phosphates to natural lakes to study the eutrophication process. What is your ethical position on such studies? Should they be banned, or is the knowledge gained worth the harm they cause?
What will be an ideal response?To study the maximum amount of genome diversity in the human species, which of the following provides the most information?
A) karyotyping B) SNP variation C) DNA fingerprinting D) sequencing of one or more specific genes E) ortholog comparisons