Describe the differences between an energy pyramid, a biomass pyramid, and and energy pyramid?

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism