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Author Question: What is the most serious environmental challenge for Canadians and Americans? A) acid rain B) ... (Read 19 times) |
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.