Answer:
I don't think much would change more animals would have lot of food and we would have lot of air
The first one because just think about how light oxygen or air is
Answer:
They help to stop harmful germs from entering the body
Explanation:
- The skin can prevent bacteria and microorganisms from entering the body (unless it is damaged)
- Mucous membranes line the mouth and nose and are coated with secretions that fight microorganisms and harmful bacteria
- Tears help to clear debris from the eye to prevent infection
Plants showing hydrotropism grow in response to water.
