Sickle-cell anemia is an autosomal recessive condition. This means that: a. Two copies are needed for the condition to occur
b. Individuals can be a carrier for the condition
c. Families can go many generations without realizing that it occurs in their family
d. All of the above.

What are some things that limit population growth?

Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide → hydrazine + water b. nitrogen + water → hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide → nitrogen + water d. water + hydrogen peroxide → nitrogen + hydrazine

How does the nervous system affect the excretory system?