Sara's father used to say of her: "If Sara had been a boy and had lived a few centuries ago, her father would have said, 'She drew her sword and went around the country, would have saved and protected those who were.
Since organisms have evolved at least some protective mechanisms to combat harmful environmental phenomena such as ultraviolet radiation,
some form of protection is a hallmark of all life. Biological membranes, such as animal skins, provide protection from a variety of threats. An important role in protecting organisms from pathogens and excessive water loss
They supplement physiological protection by adopting habitats and behaviors that protect them from harmful sources of harm.
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