What are attributes of oral contraceptives? (Check all that apply.) 

_____ They contain a progesterone and sometimes an estrogen analogue.
_____ The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills.
_____ They help protect against ovarian and endometrial cancer.
_____ They are appropriate for use by smokers over age 35.
_____ They have a low failure rate of only 1 to 5% a year.
_____ They act by inhibiting LH and FSH secretion, inhibiting ovulation.
 


__X__ They contain a progesterone and sometimes an estrogen analogue.
_____ The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills.
__X__ They help protect against ovarian and endometrial cancer.
_____ They are appropriate for use by smokers over age 35.
__X__ They have a low failure rate of only 1 to 5% a year.
__X__ They act by inhibiting LH and FSH secretion, inhibiting ovulation.
 

Biology & Microbiology

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In comparing the chromosomes of humans, chimpanzees, gorillas, and orangutans which type of genomic evolution has occured with chromosome 3 in the orangutan compared to the other species?

A. inversion. B. duplication. C. splitting. D. both inversion and duplication. E. splitting of the gene and duplication of the entire chromosome.

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Birds have

A. a backcurrent lung. B. an air sac lung. C. a parabronchial lung. D. a negative pressure lung. E. a tracheal lung.

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The study of body plans and structures among groups of organisms is called

a. homologous structures. b. analogous structures. c. comparative morphology. d. morphological convergence. e. morphological divergence.

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Scramble competition results when all individuals in a population share the limited resources

____________________ Indicate whether the statement is true or false.

Biology & Microbiology