Which of the following is NOT a major component of soil?

A. rock fragments
B. organic matter
C. microbes
D. bacteria
E. chloroplasts

Answer: E. chloroplasts

Biology & Microbiology

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The interaction of several polypeptide chains in a

hemoglobin molecule is its __________ structure. a. primary b. secondary c. tertiary d. quaternary e. combined

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________ detect distortions in themselves and nearby structures

Fill in the blank(s) with correct word

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Engelmann assumes the bacteria are attracted to areas of ________ O2 concentration

a. Low b. Medium c. High

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Which skeletal function would first be impaired if the body produced an excess of calcitonin?

A. support B. movement C. protection of internal structures D. mineral storage E. blood cell production

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