for years, scientist have known that the major components of the plasma membrane were lipids and proteins. which model best describes the molecular makeup of the plasma membrane.

As a small change in a person's dna can cause a genetic disorder

Ascientific idea becomes valid when it is what?

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above