An individual's ability to fight off infection is called:
A) virulence.
B) immunity.
C) host resistance.
D) communicability.
Answer: C) host resistance.
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An insect that exhibits resistance to a pesticide
a. developed the resistance in response to the pesticide. b. mutated when exposed to the pesticide. c. inherited genes that made it resistant to the pesticide. d. drifted from an adjacent field. e. received resistance genes during mating.
How are leaf-dropping in trees and colour change in the coat of the Artic fox related?
a. They are examples found in dark-dependent organisms. b. They are examples of adaptation to climate. c. They are examples found in organisms that live in the same area. d. They are examples of photoperiod-dependent phenomena.
Which essential plant nutrient is used to synthesize DNA?
A. phosphorus B. potassium C. magnesium D. calcium
The M protein enhances the virulence of Streptococcus by preventing phagocytosis
Indicate whether the statement is true or false