Liebig's Law of the Minimum states that:
A. there must be a minimum number of
primary producers to support an ecosystem.
B. primary production is usually determined
by the abundance of just a single nutrient.
C. primary production is limited by the
nutrient that is least available for use by
primary producers.
D. primary production is limited by the
nutrient that is in the greatest abundance for
use by primary
E. producers.
F. primary production in all ecosystems is
limited by the same nutrient.
C
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Decontaminating and disinfecting surfaces may result in a decreased removal of contaminating organisms when used in combination. This is due to the fact that:
a. agents are all synergistic and should not be of concern in the laboratory. b. agents mixed together may actually inac-tivate each other or create harmful chem-icals resulting in additional hazards. c. agents are antagonistic and will not be as effective. d. agents are already premixed to maximize sterilization.
_________ occurs when an intravenous injection of antibodies, bsuch as gamma globulin is administered to someone as a treatment. The serum used for emergency treatment of snakebites is an example of this type of immunity.
A) Artificial passive immunity. B) Artificial active immunity. C) Natural passive immunity. D) Natural active immunity. E) Artificial specific immunity.
"Vertebrates" refers to animals that possess
a. hair. b. mammary glands. c. the ability to give birth to live young. d. lungs. e. a backbone.
Biofilms provide an alternative means for bacteria to attach to surfaces within the body
Indicate whether the statement is true or false