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.
1. simple diffusion.
<span>2. facilitated diffusion.
i think</span>
Human immunodeficiency virus. (HIV)
Aids are a infectious agent.
It spends by any contact. ex: sex, hands, and any contact.
If someone has these diseases, they need to contact a doctor ASAP, and get treat. (some diseases can be controlled but not heal, meaning can NOT go away)!
