Question 1:
Name two external structures of a leaf.
Answer:
Lamina and petiole
Name two external structures of a leaf.
Answer:
Lamina and petiole
Question 2:
What is the importance of cuticle in leaves?
Answer:
To prevent excessive loss of water through evaporation.
What is the importance of cuticle in leaves?
Answer:
To prevent excessive loss of water through evaporation.
Question 3:
Name five internal structures of a leaf.
Answer:
Upper epidermis, palisade mesophyll, spongy mesophyll, vascular bundle and lower epidermis.
Name five internal structures of a leaf.
Answer:
Upper epidermis, palisade mesophyll, spongy mesophyll, vascular bundle and lower epidermis.
Question 4:
State the functions of xylem and phloem.
Answer:
Xylem – to transport water and mineral salts absorbed from the roots to the leaves.
Phloem – to transport organic substances produced during photosynthesis from the leaves to other parts of the plants.
State the functions of xylem and phloem.
Answer:
Xylem – to transport water and mineral salts absorbed from the roots to the leaves.
Phloem – to transport organic substances produced during photosynthesis from the leaves to other parts of the plants.
Question 5:
The layer of cuticle and upper epidermis is transparent. Justify.
Answer:
To allow sunlight to pass through it for photosynthesis.
The layer of cuticle and upper epidermis is transparent. Justify.
Answer:
To allow sunlight to pass through it for photosynthesis.
Question 6:
Compare the layers of palisade mesophyll and spongy mesophyll.
Answer:
Palisade mesophyll – Contains many and chloroplasts and closely arranged.
Spongy mesophyll – Contains less number of chloroplast and loosely arranged.
Compare the layers of palisade mesophyll and spongy mesophyll.
Answer:
Palisade mesophyll – Contains many and chloroplasts and closely arranged.
Spongy mesophyll – Contains less number of chloroplast and loosely arranged.