People and animals breathe in oxygen from the air and exhale carbon dioxide.
what happens to the carbon dioxide in the air?
a. some animals breathe in carbon dioxide and exhale oxygen.
b. the carbon dioxide floats into the atmosphere and forms clouds.
c. plants use carbon dioxide to make sugars and oxygen.

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.