Question

Mention characteristics by which we can identify the modified roots as roots?
Ncert solutions for Class 11th Biology Lab Manual Chapter 7 Exercise 7 Question 2

Answer 1

1-hanging roots of banyan tree are modified ones,also called as prop roots/pillar roots.
They helps in support....
2-roots that come above the soil are called as pneumatophores are also modified roots....
They help in respiration.Ex-rhizophora, avicennia
3-in fabaceae members roots have nodules are called as nodular roots....
they help in fixing atmospheric nitrogen. Ex-groundnut
4-in some plants roots are chlorophyllous.....
they helps in photosynthesis. Ex-taeniophyllum
All the above are root modifications.

Answer 2

Answer:

Roots are a geotropic structure and emerge from the radicle of a seed. Modified roots are those whose shape and functions get changed due to certain modifications.

Explanation:

Modified roots can be identified as modified roots:

1. If a root does not have geotropic nature then it is considered as modified roots like hanging roots of banyan and aerial roots.

2. If a root is used as a food item then it has storage functions and thus it is considered as modified root like in carrot, radish etc.

3. In some cases roots mergers out of the ground for respiration like in Rhizophora. This is also an example of modified roots.

4. If roots are emerging from the nodes then they are also considered as modified roots.

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