The trp and lac operons are both subject to forms of control that are typically called negative
Indicate whether the statement is true or false
TRUE
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The use of birth control pills (oral contraceptives) _____
A) reduces the incidence of ovulation B) prevents fertilization by keeping the sperm and egg physically separated by a mechanical barrier C) prevents implantation of an embryo D) prevents sperm from exiting the male urethra E) prevents oocytes from entering the uterus
An island is on the migration route of sea birds. This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island. The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:
A. the sea bird population is larger. B. there are fewer mutations in the sea birds. C. mating is random in the tree nesting birds. D. of high immigration in the sea bird population. E. natural selection is stronger in the tree nesting birds. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Gibberellins have their most dramatic effects
a. on leaves. b. in promoting abscission. c. on fruit ripening. d. on stem lengthening. e. on flowers.
RNA can act like an enzyme
Indicate whether the statement is true or false