A mucous membrane or mucosa is a membrane that lines various cavities in the body and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue...
Answer:
D. It was removed from the atmosphere for all of the reasons listed above. :)
Explanation:
The respiratory system is the system of organs that allow the body to take in oxygen and expel carbon dioxide, this process is known as gaseous exchange. We generally breathe between 12 and 20 times a minute.
Those components are found in Chloroplasts.
The answer is Keystone. Keystone is a species in which others species in the ecosystem largely depend on, if the species was removed the ecosystem would change drastically.
