Which statement is true of the adaptive, but not the innate, immune system?

Choose 1

(Choice A)
A
It involves the use of lymphocytes.

(Choice B)
B
It fights both viruses and bacteria.

(Choice C)
C
The receptors are highly specific.

(Choice D)
D
Many cells work together to coordinate the response.

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Which description provides the best objective summary of the article in the passage?

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism