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When Dr. Jeff pedals the bike, what three major body systems he is using?

How much serem is need to make kids?

Which word can describe a person's gender identity? a) female b) intersexual c) asexual d) androgynous

If mary has stopped her resistance training for three weeks, once she continues, she should work out harder to get back in shape keep her workout the same as before her break reduce the weight during the workout session reduce the rest times between sets