Please help me out Identify one source of carbon that can be found in each of these four spheres: atmosphere (air), geosphere (land), biosphere (living organisms) and hydrosphere (water).

The mitochondria has been described as the engine of the cell. Why is this a fitting nickname? How is this organelle involved in the process of cellular respiration?

Describe the process of photosynthesis in plants. Why is this process important to animals and humans?

How are the processes of cellular respiration, photosynthesis and carbon cycle related to each other?

Explain how one of the processes discussed in this module (photosynthesis, cellular respiration or the carbon cycle) apply to both the Law of Conservation of Matter and Law of Conservation of Energy.