Tag: root system in plants

Questions Related to root system in plants

Select the correct statements.
(a) From the region of elongation, some of the epidermal cells form root hairs.
(b) Pneumatophores are seen in Sonneratia.
(c) Adventitious roots are seen in Banyan tree.
(d) Maize and Sugarcane have prop roots.

  1. a and d

  2. a, c and d

  3. c and d

  4. b and c

  5. a, b and d


Correct Option: D

Swollen root of Radish is made of two parts.

  1. Stem and epicotyl

  2. Primary root and hypocotyl

  3. Primary root and epicotyl

  4. Secondary root and primary root


Correct Option: D

Peculiarity of Dalbergia tap root system is?

  1. Surface feeder

  2. Presence of nodules

  3. Formation of buds

  4. Lenticels for aeration


Correct Option: A
Explanation:

Dalbergia is the fast-growing, hardy and surface feeder tap root. They are having a long taproot and numerous surface roots as well. In surface feeders, the taproot does not grow or develop to a great extent.

The cymose or surface feeder tap root systems of some annual plants are consisting of thin fibrous roots. Therefore, also called a fibrous tap root system.

The correct option is A.

In Tinopsora, the adventitious roots are.

  1. Hanging

  2. Green

  3. Both A and B

  4. Clinging in nature


Correct Option: C
Explanation:

Modified adventitious roots, which become green colour and perform photosynthesis. These are called as assimilatory roots, for example, Taeniophyllum, Trapa, Tinospora cordifolia. Tinospora is having climbing photosynthetic roots and is aerial. These are like the green hanging threads developing from the nodes during the rainy seasons.

The correct answers are A and B both. 

In fern Salvinia, the adventitious roots are.

  1. Storage in function

  2. Spongy due to aerenchyma

  3. Green and photosynthetic

  4. Modification of leaf


Correct Option: D

Assertion : Allelopathy is a form of ammensalism that occurs in plants

Reason : Association of rooting plants with fungal hyphae, is an important example of ammensalism.


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true


Correct Option: C
Explanation:

Allelopathy is a phenomenon associated with plants, in which one plant produce some chemical substances, which inhibits the growth of other plant species. While, in ammensalism, one species suffer and other remain unaffected.

Nodulation of legumes is reduced in deficiency of.

  1. Sulphur and potassium

  2. Sulphur and boron

  3. Manganese and copper

  4. Zinc


Correct Option: A

Read the following four statements:
(A) A simple experiment called girdling was used to identify the tissue through which food is translocated.
(B) Plant factors that effect transpiration include temperature, light, wind velocity and humidity.
(C) Most of the water flow in root occur via apoplast.
(D) In young root, water directly enters into the xylem vessels.
How many of the above statements are right?

  1. Four

  2. Three

  3. Two

  4. One


Correct Option: A

Mycorrhizal association controls root affecting pathogens in plants because.

  1. Mychorrhizal fungi colonize the roots and acts as a barrier during infection

  2. Mychorrhizal fungi helps in phosphorus uptake

  3. Mychorrhizal fungi help during stress and shock

  4. Mychorrhizal fungi produce toxins against pathogens


Correct Option: A

Select the incorrect match with respect to the plant and the relative plant part modified for food storage.

  1. Lathyrus odoratus (sweet potato) - Root

  2. Solanum tuberosum (potato) - Stem

  3. Allium cepa (onion) - Leaves

  4. Dahlia (Dahlia) - Leaves


Correct Option: D
Explanation:

The incorrect match is: 

Dahlia(Dahlia) - Leaves
So, the correct answer is (d).