Foraminifera are predatory protists with a ____ shell, which is the ultimate source of _____

a. silicon; oxygen
b. carbon; carbon dioxide
c. chitin; ozone


d. bicarbonate; chalk and limestone
e. calcium carbonate; chalk and limestone


ANSWER: e

Biology & Microbiology

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Indicate whether the statement is true or false.

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If one person in 50 is a carrier of an autosomal recessive disorder in a population, the chance that an unrelated man and woman are both carriers is

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The ________ route of drug administration is commonly used for small laboratory animals such as the rat.

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