Lactose intolerance is caused by a(n) ____

a. nucleotide substitution that prevents lactose production
b. variant manifestation of galactosemia
c. accumulation of galactose-1-phosphate
d. inability to digest lactose

e. excess in lactose production


d

Biology & Microbiology

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Recall that during the Paleozoic Era, atmospheric CO2 levels decreased. Why?

A. New, extensive mountain ranges formed and chemical weathering decreased. B. Earth's plate tectonics changed dramatically, and subduction increased. C. Photosynthetic, woody plants first appeared during this period. D. Volcanism decreased during this period.

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Which two cell scientists are credited with the formulation of the cell theory, also known as the cell doctrine?

A. Watson and Crick B. Schleiden and Schwann C. Schleiden and Hooke D. Schwann and Jenner

Biology & Microbiology

What type of thinking is required?

What will be an ideal response?

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What type of fiber accounts for the strength of various connective tissues?

A. reticular B. elastic C. actin D. collagen

Biology & Microbiology