On what do biologists base their classification of organisms?

Illustrate, label, and explain how atmospheric carbon and oxygen find there way into a consumer and then back into a producer. include the following terms in your illustration: co2, 02, respiration, photosynthesis, sugar, mitochondria, chloroplast, water, solar radiation

Which blood cell spend most of their time in the lymphatic system?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring