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Scientist believe that about 20 to 25% of the universe is made of
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Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine
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Does all the energy stored by the phytoplankton reach the top level of the pyramid
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Deserts (especially true deserts) are not easy places for animals to live. animals who live in them often have special features that them survive. which adaptation would be for this group of animals? a) keen eye sight b) short, narrow legs c) tolerate heat d) webbed feet
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Scientist believe that about 20 to 25% of the universe is made of...
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