Different versions of a protein, which are known as ________, are adapted to function in different tissues or at different stages of development.
A) homologous
B) families
C) mutations
D) isoforms
E) subunits
Ans: D) isoforms
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Which of the following is a Gram-negative bacterium that acts as a predator on other Gram-negative bacteria, and might be used to control populations of Gram-negative human pathogens in locations such as poultry farms?
A. Salmonella enteritidis B. E. coli C. Vibrio choerae D. Bdellovibrio
What type of plants are usually seedless?
A. Aneuploid B. Diploid C. Triploid D. Tetraploid
The total biomass in an ecosystem at any one point in time is the
A. standing crop. B. gross primary production. C. net primary production. D. None of these choices are correct. E. pyramid of energy.
True or False: All agents that use a portal of entry to initiate an infection are called exogenous agents.
What will be an ideal response?