Birth control pills are a popular form of contraception for women. how do birth control pills prevent pregnancy?

a. by covering the cervix and blocking sperm from entering the uterus

b. by blocking the fallopian tubes and keeping the eggs from reaching the uterus

c. by introducing female hormones that prevent the ovaries from releasing eggs
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According to proper standing posture, from a side view, which parts of the body should be aligned? a. ear, shoulder, hip, knee, and ankle b. stomach, hip, knee, and ankle c. nose, shoulder, hip, knee d. ear, shoulder, fingers, ankle

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?

One way to improve self-esteem is through positive self-talk. select the best answer from the choices provided. t f