Topic: Food Energy and Respiration Subtopic: Making the air moist, warm and clean
Why we should not breathe through mouth?
Answer: Mouth does not contain mucus, blood vessels near the surface or hair that could trap the dust particles or germs.
- What is job of phloem?
- What are minerals and functions?
- How many types of pollination are there?
- How are xylem and phloem arranged in roots?
- What are root hairs?
- How are proteins digested?