The immune responses that result in the destruction of transplanted tissues are known collectively as 

A. cytotoxic T-cell responses.
B. antigen responses.
C. secondary responses.
D. rejection responses.


D. rejection responses.

Biology & Microbiology

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In a natural population of diverse slow-growing prokaryotic cells, what type of viruses would you expect to be most common?

A) lytic bacteriophages B) enveloped viruses C) icosahedral viruses D) temperate bacteriophages

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In any one place, _____ different types of Anolis can coexist because they hunt food in different ways and in different parts of the vegetation

A. one B. two C. four D. six E. eight

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Red blood cells transport both oxygen and carbon dioxide molecules.

a. true b. false

Biology & Microbiology

Many scientists believe that the evolution of multigene families, such as the genes for hemoglobin, is a result of which type of genetic rearrangement?

A) Duplication B) Deletion C) Inversion D) Reciprocal translocation E) Nonreciprocal translocation

Biology & Microbiology