The level of organization where factors such as
sunlight, rainfall, and temperature enter the picture is
the
a. organ system.
b. ecosystem.
c. biosphere.
d. molecule.
e. community.
Answer: b
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Transgenic animals are bred ________
a. for convenience in production b. all of the choices c. to increase food yield d. for medical research
Insertion mutations are often caused by
a. base-pair substitutions. b. frameshift mutations. c. transposable elements. d. gene duplications. e. deletions
Eukaryotes have inducible genes that respond to environmental stimuli
__________________ Indicate whether the statement is true or false.
After the bacteriophage uses its tail fibers to attach to the bacterial host, what will happen next in the lytic cycle?
A. Integration of viral nucleic acid into the bacterial genome B. Assembly of the new viruses C. Lysis of the bacterial cell wall D. Degradation of host DNA E. Injection of viral DNA