How is the 3rd line of defense (adaptive immunity) different than the first two?

A)It gives a specific, targeted response.
B)It prohibits pathogens from entering the body.

A) ↑ see the search above

ANSWER:

If the data that a scientist collects and the conclusions that he makes disagree with his hypotheses, the scientist should reject the hypothesis.

EXPLANATION:

Any hypothesis needs to be supported by conclusions that are positive in nature for being accepted. When different experiments show the same conclusion for the hypothesis or support the hypothesis, the hypothesis becomes accepted as a law. On the other hand, when the conclusions do not support the hypothesis even after bringing about minor changes or adjustments to the experiment, the hypothesis should be rejected.