Write an explanation for why a bacteriophage, a virus that infects bacterial cells, would be a good cloning vector
What will be an ideal response?
As a virus, a bacteriophage has a piece of DNA that is small, relative to the cell's genomic DNA. The natural process of viral infection involves introducing DNA into the cells, so the phage can carry the recombinant DNA into cells for replication and protein production.
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Late log phase of the bacterial growth curve
A. is marked by the production of primary metabolites. B. is marked by the production of secondary metabolites. C. is a transition into the death phase. D. shows a decline in cell numbers.
A one-way relationship in which one species
benefits and directly hurts the other is called
a. commensalism. b. competition. c. parasitism. d. predation. e. more than one of these
When all living organisms are included, which biomes contain about 70% of the biomass found on Earth's land surface?
A) forests B) grasslands C) tundras D) deserts
Which of the following is NOT an example of a density-dependent limiting factor that will influence carrying capacity?
a) disease b) predation c) flooding d) territory availability e) food supply