They are the opposite of each other.
Photosynthesis requires carbon dioxide and releases oxygen, Cellular respiration requires oxygen and releases carbon dioxide.
Food web provides a better model of an ecosystem and model of many different consumers
1. The central nervous system including brain and spinal cord.
2. The peripheral nervous system including nerves coming out from the brain and spinal cord, i.e., cranial nerves and spinal nerves.
3. The autonomic nervous system including sympathetic nervous system and parasympathetic nervous system.
30% of the earth's surface is covered by forests.
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