The decrease or loss of virulence of a pathogen is referred to as
A) aging.
B) attenuation.
C) disinfectivity.
D) lethal dose.
Answer: B
You might also like to view...
A moistened swab rubbed onto a person's forearm then onto a nutrient agar plate with 7.5% NaCl would MOST likely result in the isolation of ________ spp
A) Clostridium B) Halobacterium C) Sarcina D) Staphylococcus
Which of the following is not a plant hormone?
A) brassinosteroids B) ethylene C) abscisic acid D) auxin E) allomone
Resistance of some animals to certain viral diseases is based on
A. lack of spikes for attachment. B. phagocytosis of the virus by the host cell. C. the presence of the viral envelope. D. lack of specific receptors on the host cell.
What type of population growth effect is a flood that washes away many rabbits of population?
a. a density-dependent factor b. a limiting factor dependent on the individuals c. a consequence of exponential growth d. a density-independent factor e. an initial carrying capacity