The highest level of organization in an animal is a(n) a. cell
b. tissue
c. organ
d. system

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it