What type of immunity provides lifetime protection for the body against a specific pathogen?
Question 6 options:

A: active immunity
B: incomplete immunity
C: complete immunity
D:passive immunity

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

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

Why has two different alleles for the same trait?