Biology, 20.07.2019 22:20, Amazingpandakid
What is a characteristic of aging and the immune system? a. immunity in older people does not seem to be affected by regular exercise. b. immune function does not decline with age in people who maintain good nutrition. c. antibiotics are often ineffective in treating infections in older people who have deficient immune systems. d. in the united states, infectious diseases are a minor cause of deaths in the elderly?
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Biology, 21.06.2019 18:00, jstephanie644
Cells tend to have a relatively small and uniform size. why arenβt cells larger?
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Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight
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