Which greenhouse gas is emitted when burn fossil fuels for energy?

A. nitrogen

B. oxygen

C. carbon dioxide

D. helium

How many chromosomes does each cell have?

3. What ecosystem has never been colonized by humans?

As life began to populate earth's surface, what change was seen in the atmosphere? A. more oxygen was consumed B. more carbon dioxide was added C. more carbon dioxide was consumed D. more oxygen was added

The phosphorus cycle differs from the bigeoc hemical cycle in that

When a few drops of hydrogen peroxide are added to a living tissue such as liver or kidney, fizzing or foaming occurs immediately. Briefly explain the observation

The lightest wight rocks are found in the

Carbon is an element that is essential for the make up of a) no molecules b) all molecules c) organic molecules b) inorganic molecules

Charlene just said hi what do you think she is thinking

C ^H! @O ^ + O @S 6 CO @ + 6 H @O DG = - 686 kcal/mol This reaction represents cellular respiration. What happens to the energy released from glucose during this reaction?

Which statement about the Internet is correct? Select the best answer from the choices provided. A.) It is completely banned by China and other repressive regimes. B.) It can bring greater political freedom to oppressive regimes. C.