Question

3.1 Mention two function of lower epidermis.
3.2 Where are chloroplasts present in the leaf?
3.3What are the functions of xylem and phloem in leaf?
3.4 List one structural and one functional difference between upper and lower epidermis.​

Answer 1

1) Function of lower epidermis are as follows -

• The lower epidermis helps in the absorption of the sunlight.

• The lower epidermis also prevents the unnecessary vaporization.

2) Chloroplast is a plant cellular organelle which is situated mostly in the cytoplasm of a plant cell.

3) Xylem and phloem mainly performs the internal liquid transportation in the plant body.

4) • Upper epidermis has very less amount of stomata as compared with the lower epidermis.

• The upper epidermis mainly performs vaporization and prevention works but the lower epidermis mainly performs the gaseous exchange works.