Which phrase best summarizes the function of the endocrine system? A. disposal of dissolved waste molecules

B. use of hormones to regulate body processes

C. creation of the force that enables the body to move

D. movement of substances to and from cells where they are needed or produced

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

1. is geographic distribution

2 is increasing complexity

3 is transitional forms