Question

Identify the plants with the following characters respectively:
I) Swollen storage fibrous roots
II) Roots absorbing moisture from atmosphere
III) Roots to get oxygen for respiration
A) turnip, B) Avicennia, C) Vanda, D) carrot, E) Asparagus, F) Maize, G) sweet potato

• A. A, C, D
• B. B, F, G
• C. E, C, B
• D. F, C, A

Hint:

Pneumatophores are always found in swampy mangroves like Avicennia and Rhizophora.
Recognizing respiratory roots immediately associates the third character with Avicennia (B).

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks us to identify the specific plants corresponding to three specialized root modifications: storage fibrous roots, hygroscopic moisture-absorbing roots, and pneumatophores (respiratory roots).

Step 2: Key Concepts and Approach:
We analyze physiological and ecological root modifications in the given plant species list.
We match each function (I, II, III) with the appropriate plant (A through G).

Step 3: Detailed Explanation:

• I) Swollen storage fibrous roots: Asparagus (E) develops fasciculated tuberous roots, which are modified adventitious roots specialized for the storage of food and water.

• II) Roots absorbing moisture from the atmosphere: Vanda (C) is an epiphytic orchid.
It develops hanging aerial roots covered with a specialized sponge-like tissue called velamen, which absorbs atmospheric moisture.

• III) Roots to get oxygen for respiration: Avicennia (B) is a halophyte (mangrove plant) growing in oxygen-deficient swampy areas.
It produces negatively geotropic roots called pneumatophores that grow vertically upwards to obtain oxygen through pores called lenticels.


Step 4: Final Answer:
The plants corresponding to characters I, II, and III are Asparagus (E), Vanda (C), and Avicennia (B), respectively.