T.S of Dicot Stem

Q.

__ in the dicot stem is made of collenchyma cells

Q.

Explain the process of secondary growth in stems of woody angiosperm with help of schematic diagrams. What is the significance?

Q.

Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or dicot stem? Give reasons.

Q. Choose the correct option with respect to dicot stem:
i) Vascular bundles are arranged in a ring
ii) Exarch arrangement of secondary xylem
iii) Vascular bundles are conjoint, collateral and open type

1. Only I is correct
2. Only II is correct
3. Both I and III are correct
4. All (I, II and III ) are correct

Q. In older woody tissue, the gaseous exchange takes place through

1. Lenticel
2. Hydathode
3. Stomata
4. Aerenchyma

Q. The number of the vascular bundles in a monocot root may go upto

1. 50
2. 15
3. 20
4. 100

Q. From the image given below. Identify the parts (i), (ii), (iii) and (iv) respectively.

1. Epidermis, Endodermis, Cambium, Pericycle
2. Epidermis, Endodermis, Pericycle, Protoxylem
3. Epidermis, Pericycle, Cambium, Phloem
4. Epidermis, Cortical layer, Endodermis, Protoxylem

Q. why are annual rings comparatively well marked in plants growing in hilly areas than those in coastal areas?

Q.

If you are given the hypodermis layer of dicot and a monocot stem, how will you differentiate?

1. Dicots have collenchymatous hypodermis, while it is parenchymatous is monocots

2. Monocots have collenchymatous hypodermis, while it is sclerenchymatous is dicots

3. Monocots have sclerenchymatous hypodermis, while it is collenchymatous in dicots

4. Monocots do not have a hypodermis