Answer:
To carry out life processes like breathing, respiration, digestion, excretion etc.
Explanation:
As I know, the effects of human activities on biogeochemical cycling are <span>examples of an ecological study involves the ecosystem level of organization.</span>
Answer:
Root hair cells are alive and therefore need energy, which is why root hair cells contain many mitochondria in them. Root hair cells don't contain chloroplasts. Chloroplasts are used by the plant to make food using light energy. Since the roots aren't exposed to any form of light, they have no need for chloroplasts.
