Structure of Leaf

Q.

Explain an activity to observe a prepared temporary mount of onion peel.

Q.

Guard cells of stoma are ____.

1. irregular in shape

2. convex in shape

3. long and cylindrical in shape

4. kidney-shaped

Q.

The process of removing the green color of a leaf is called?

Q.

Why is it necessary to put the onion peel immediately in a watch glass containing water to prepare a temporary mount?

Q.

What are the different types of stains?

Q.

Why is the underside of the leaf less green in colour?

1. Due to less amount of chloroplast in the cell.

2. Due to less amount of sunlight reaching the underside of leaf.

3. Due to the presence of high amount of accessory pigments.

4. Due to high amount of chloroplasts in the cell.

Q.

The water vapour leaves and carbon dioxide enters a leaf through the ___.

1. stomata

2. grana

3. porphyrin rings

4. photons

Q. What is cuticle and what is its significance?

Q.

What is staining done prior to mounting?

Q.

The main task of stomata is to_____.

1. release of oxygen

2. the release of carbon dioxide

3. intake of carbon dioxide and the release of oxygen

4. intake of carbon dioxide

Q. Identify the structure through which stomatal transpiration occures.

1. 
2. 
3. 

Q.

The part that does not belong to carpel is

1. stigma

2. style

3. ovary

4. filament

Q. Large green plants are called as 'green muffler'. Why?

Q. Why staining is done prior to mounting?

Q. What are the precautions to be taken while preparing the mount of leaf peel for stomata?

Q.

List two functions of stomata ?

Q.

41. The stain used in the preparation of temporary mount of a leaf peel to observe stomata is :

(a) safranin (b) methylene blue(c) glycerin (d) iodine solution

Q. The stomata of Rheo plant is .......... shaped.

1. Rhombus
2. Square
3. Circular
4. Triangular

Q. Two cross-sections of stem and root appear similar, when viewed by naked eye, but under microscope, they can be differentiated by

1. Exarch condition of root and stem
2. Endarch condition of stem and exarch condition of root
3. Endarch condition of stem and root
4. Endarch condition of root and exarch condition stem