A vector is an organism that carries
A. mutations.
B. toxins.
C. spores.
D. parasites.
D. parasites.
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In angiosperms, where does pollen production take place?
a. megasporangium b. antipodal cells c. microsporangium d. synergid cells
Which of the following is true about membrane filters?
A. It can be used only to remove organisms from liquids. B. It can be used only to remove organisms from liquids and it does not truly sterilize because it removes rather than kills microorganisms. C. It does not truly sterilize because it removes rather than kills microorganisms. D. It can't be depended on to remove all viruses from liquids.
Enzymes do not
a. control the speed of a reaction. b. change shapes to facilitate certain reactions. c. act on substrates. d. may require cofactors. e. react with an active site.
Topographic features, such as mountains and valleys, influence the climate of a region
Indicate whether the statement is true or false