Multicelled, absorptive structures called __________

are on each fold of the small intestines. Fill in the blank(s) with the appropriate word(s).


Answer: villi

Biology & Microbiology

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What is one technique that is used to identify a specific RNA sequence of a sample from a library?

A. Western blotting B. Northern blotting C. Southern blotting D. Eastern blotting

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A supportive cell wall is found surrounding the plasma membrane of each of the following types of

cells EXCEPT ____.

a. plant cells b. fungal cells c. many types of protists d. animal cells e. bacterial cells

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After obtaining DNA fragments by PCR, the

fragments are

a. separated by a centrifuge. b. viewed under a microscope. c. separated by an electric current. d. inserted into a plasmid. e. chopped up using restriction enzymes

Biology & Microbiology

Biological magnification refers to the

1.increase in size of animals as they progress through a food chain. 2.increase in size of organisms as they progress through ecological succession. 3.increase in the efficiency of energy utilization as organisms progress through a food chain. 4.accumulation of toxic pollutants as animals pass through a food chain. 5.growth of organ size within organisms.

Biology & Microbiology