DNA that contains "foreign" genes from another organism
A. is called RNA.
B. is called recombinant DNA.
C. has experienced a point mutation.
D. can no longer function as a genetic blueprint.
B. is called recombinant DNA.
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Robert Koch contributed to the field of microbiology by being the first person to
A) develop the tuberculin test. B) formulate four postulates for definitively linking a specific microorganism to a specific disease. C) use agar as a solidifying agent in growth media. D) develop the tuberculin test, formulate four postulates for definitively linking a specific microorganism to a specific disease, and use agar as a solidifying agent in growth media.
Biological membranes are held together mainly by ____
a. hydrogen bonds between lipid molecules b. hydration layers over lipid molecules c. exclusion of the nonpolar regions of lipids by water d. hydrogen bonds between water molecules e. surface tension at the interface between layers of water molecules
Corals in a tropical reef provide protection from ocean waves and currents to the other species that live there and have the greatest influence on the reef community. The corals are a(n) ______ species.
a. invasive b. foundation c. pioneer d. keystone
Which type of antibody is involved in the allergic response?
a) IgM b) IgA c) IgE d) IgD.