The sickle cell trait is highest in and probably originated in what region of the world?

Genetic changes that allow an organism to survive and reproduce in a specific environment is

One of the first examples of biological warfare involved the deliberate spread of ___________ by Europeans.

Individuals with one copy of sickle allele have ______________.

The term Caucasoid refers to physical characteristics of what population of humans?

Which of the following is the closest relative of land plants?

Simplify. Write the answer with only positive exponents. Assume that all variables represent nonzero real numbers.(2x5y2)2(3y5)3

Find the product.(9a – 4)2

Simplify the expression using the products to powers rule.(-3pqr)4

Simplify. Write the answer with only positive exponents. Assume that all variables represent nonzero real numbers.(3x3y4)2(2y2)3