0

Morphology of Plants - Root (Class - XI)

Description: Morphology of Plants - Root (Class - XI)
Number of Questions: 15
Created by:
Tags: Morphology of Plants - Root (Class - XI) Plants Roots Botany (Class - XI) Structural Organisation in Animals and Plants Biology
Attempted 0/15 Correct 0 Score 0

Which of the following statements about root is correct?

  1. Roots are positively geotropic.

  2. Roots are positively phototropic.

  3. Roots bear reproductive part.

  4. Roots have distinct nodes and inter-nodes.


Correct Option: A
Explanation:

Roots are positively geotropic.

The function of root cap is

  1. providing nutrition to root

  2. cell division

  3. supporting the root

  4. protecting the root


Correct Option: D
Explanation:

Root cap covers the meristem and has protective function.

Root hairs are

  1. bicellular

  2. multicellular

  3. unicellular

  4. tricellular


Correct Option: C
Explanation:

Root hairs are unicellular.

Which of the following is found in root cap?

  1. Sugar

  2. Starch grain

  3. Fat droplet

  4. Water


Correct Option: B
Explanation:

Root cap possesses starch grains.

What is the function of statocytes?

  1. Meristem protection

  2. Gravity perception

  3. Mucilage secretion

  4. Starch granules storage


Correct Option: B
Explanation:

Statocytes are involved in gravity perception in plants.

Which cells form the root cap?

  1. Collenchyma cells

  2. Parenchyma cells

  3. Sclerenchyma cells

  4. None of these


Correct Option: B
Explanation:

Root cap has parenchymatous multicellular structure.

Which plant bears multiple root caps?

  1. Tinospora

  2. Cascuta

  3. Screw pine

  4. Pistia


Correct Option: C
Explanation:

Screw pine bears multiple root cap.

Root cap is absent in

  1. some aquatic plants

  2. some parasitic plants

  3. some xerophytic plants

  4. some insectivorous plants


Correct Option: B
Explanation:

Root cap is absent in some parasitic plants.

What is meant by "root branches are endogenous in origin"?

  1. They develop from surface of the parent root.

  2. They develop independently of the main root.

  3. They develop from the interior of the root.

  4. Multiple root branches develop from a single cell.


Correct Option: C
Explanation:

Root branches develop from the interior of the parent root.

From which part of a plant do the adventitious roots develop?

  1. Primary root

  2. Radicle

  3. Leaf or stem

  4. Flower


Correct Option: C
Explanation:

Adventitious roots develop from leaves or stem.

Which region is essential for the growth of root?

  1. Zone of elongation

  2. Zone of cell division

  3. Root hair zone

  4. Permanent zone


Correct Option: B
Explanation:

Zone of cell division is essential for the growth of root.

Where is growth point of roots located?

  1. Terminally

  2. Sub-terminally

  3. Laterally

  4. At origin


Correct Option: B
Explanation:

The growth point of roots is sub-terminal.

The piliferous layer of the root is

  1. protected by root cap

  2. a layer of active growth

  3. covered by numerous hair

  4. responsible for increase in length


Correct Option: C
Explanation:

Piliferous layer of the root is covered with numerous hair.

What kind of cells make the outer layer of permanent tissue?

  1. Absorbing cells

  2. Impermeable cells

  3. Meristematic cells

  4. Endodermal cells


Correct Option: B
Explanation:

The outermost layer of the permanent region is made of thick-walled impermeable cells.

Calyptrogen helps in the formation of

  1. root hairs

  2. root branches

  3. root cap

  4. primary root


Correct Option: C
Explanation:

Calyptrogen helps in the formation of root cap.

- Hide questions