If a defective gene is on an x chromosome, which parent will pass the gene to a son?
a. only the father
b. either the mother or father
c. only the mother
d. neither: a son cannot inherit a gene from an x chromosome

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a. cornb. ironc. cottonseedd. vitamin a

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

What is the most appropriate method of gaining weight (muscle mass)