Which of the following ways of releasing carbon back into the atmosphere only began happening in large amounts very recently in Earth's history?
A. Decomposition
B. Combustion
C. Photosynthesis
D. Respiration

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen