In the carbon cycle, the role of plants is to

a. convert nitrogen from the soil into carbon dioxide.
b. remove carbon dioxide from the atmosphere.
c. release carbon dioxide into the atmosphere.
d. break down dead organisms into usable matter.

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things