Advertisements
Advertisements
प्रश्न
Write the two main functions of leaves
Advertisements
उत्तर
The two main functions of leaves are –
1. Photosynthesis:
Green leaves contain chlorophyll which, in the presence of sunlight, manufacture food using carbon dioxide and water.
2. Transpiration:
The surface of leaves has minute pores which help in the loss of water by evaporation. It has a cooling effect making roots absorb more water due to suction.
APPEARS IN
संबंधित प्रश्न
Name the following:
The part of the plant which grows under the ground
Define
Photosynthesis
Complete the crossword using the clues given below. Check your performance with the correct solutions given below
Clues across:
1. The plant that bears buds in leaves for propagation.
2. The flattened green part of the leaf.
3. Underground plant part.
4. The structure that develops into flower.
Clues down:
5. The central big vein of a leaf.
6. A modification seen in cactus.
State if the following statement Is true or false. Correct the statement if it is false.
In reticulate venation, veins and veinlets are irregularly distributed over the entire lamina, forming a network.
State if the following statement Is true or false. Correct the statement if it is false.
The flat green portion of the leaf is called the leaf blade.
We eat different parts of various plants. Write the part of the plant that we eat.
Mint _________
Very Short Answer Type Question:
Define petiole.
Very Short Answer Type Question:
What is midrib?
Very Short Answer Type Question:
How many types of leaf venation are there?
Observe the picture of an activity given as figure carried out with leaves of plants and polythene bag.
Now answer the following:
- Which process is demonstrated in the activity?
- When will this activity show better results on a bright sunny day or a cloudy day?
- What will you observe in the polythene bag after a few hours of setting up the activity?
- Mention any one precaution you must take while performing this activity.
