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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Herbivore biomass is positively correlated with net aboveground primary production. Herbivore biomass is positively correlated with net aboveground primary production.
growth of bacteria growth of bacteria
World Aquaculture Production "لإنتاج العالمي لتربية الأحياء" World Aquaculture Production "لإنتاج العالمي لتربية الأحياء"
economic question economic question
Early growth of corn (Zea mays), a typical monocot. Early growth of corn (Zea mays), a typical monocot.
Primary growth in a root Primary growth in a root
Video: Types of energy transfer reactions: oxidation-reduction reactions and ATP generation reactions

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