Why is passive immunity always temporary?
A) all immunity is temporary
B) the antibodies or immune cells are not produced by the body
C) the antibodies are attacked by the bodies acquired immunity
D) acquired immunity replaces passive immunity
Answer: B) the antibodies or immune cells are not produced by the body
You might also like to view...
Transgenic mice are useful to human researchers because they _____
A) can be valuable animal models of human disease B) are essential for mapping human genes C) are now used in place of bacteria for cloning human genes D) were instrumental in pinpointing the location of the huntingtin gene
The cyclic nitrogenous base used in transcription, uracil, is a ________.
A. purine B. porphyrin C. protein D. pyrimidine
Of the following hominin species, which appears first in the fossil record?
A. Australopithecus afarensis D. Australopithecus garhi B. Australopithecus africanus E. Paranthropus aethiopicus C. Australopithecus anamensis
Kinetic energy is best defined as
A. the energy of position. B. the energy of electrical charge. C. the energy of motion. D. stored energy.