Which of the following does not describe adaptive immunity?
A) evolved more recently
B) recognizes pathogens it previously fought, allowing for quicker and more aggressive defense mobilization upon later exposures to the same agent
C) generalized responses that don't vary based on the pathogen being fought
D) only in vertebrate animals
E) matures over time
Answer: C
You might also like to view...
Which process listed below does NOT require homologous recombination to maintain the new genetic material in the recipient cell?
A) conjugation of an F+ plasmid B) gene transfer through a genetic transfer agent C) transduction by a dsDNA phage Mu D) transformation of a linear piece of DNA
Which of the following respiratory systems is not dependent on the animal's circulatory system to function efficiently?
A. vertebrate lungs B. fish gills C. tracheal systems in insects D. the skin of earthworms E. All of the systems noted here are closely associated with the circulatory system.
The progressive accumulation of toxins such as DDT in higher trophic levels is known as
a. biological magnification. b. toxic ascension. c. metabolic compensation. d. tolerance deficit. e. secondary productivity.
Which of the following statements about staphylococcal food poisoning is FALSE?
A) It is caused by ingesting an enterotoxin. B) It can be prevented by adequate refrigeration of food. C) It can be prevented by heating foods to 50°C for 15 minutes. D) It is treated by replacing water and electrolytes. E) It is characterized by rapid onset and short duration of symptoms.