Which of the following is the longest lasting type of immunity?
a. an adult receiving antiserum/antitoxin injections
b. a body receives antibodies to chickenpox across the placenta
c. a person survived an infectious disease
d. a baby receives antibodies through breastfeeding
Ans: c. a person survived an infectious disease
You might also like to view...
Which of the following is NOT a characteristic of shade leaves on a plant?
A. more chlorophyll production B. less mesophyll tissue C. more air spaces D. lacking an epidermal layer
Muscle spindles are classified as:
a. chemoreceptors b. mechanoreceptors c. photoreceptors d. thermoreceptors e. pain receptors
The operation of natural selection depends
upon the fact that a. the strong always survive, whereas the weak always die. b. some individuals have a better chance to produce more offspring. c. mutations are always harmful. d. acquired characteristics are inherited. e. reproduction of all members of a species is virtually the same.
Which of the following is the most direct result of the heating up of pond water during the summer?
(A) The water's ability to hold oxygen decreases. (B) The water's ability to act as a buffer changes. (C) The viscosity of the water increases. (D) Hydrogen bonding at the surface of the water increases.