Membranes that do not contain glands are called

A. espiratory
B. serous
C. dense
D. mucous


Ans: B. serous

Biology & Microbiology

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A variety of finch species within the Hawaiian Islands have acquired different types of beaks needed for utilizing specific food resources. What is the likely process by which these different species of finches came about?

A. vertical descent with mutation. B. horizontal gene transfer. C. an accumulation of harmful genetic mutations.

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_____________ bacteria tend to form clumps.

A) Gram-positive B) Gram-negative C) Acid-fast D) Endospore forming

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If each human lung contains about 300 million alveoli with a summed total surface area for gas exchange of 40 square meters, what is the approximate surface area of a single alveolus?

A. 750 square micrometers B. 133 square millimeters C. 7.5 square micrometers D. 7.5 square millimeters E. 0.133 square micrometers F. 1.33 square micrometers

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