Multicelled, absorptive structures called __________
are on each fold of the small intestines. Fill in the blank(s) with the appropriate word(s).
Answer: villi
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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
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
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
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.