Question

Match the following

	Column-I		Column-II
i.	Tap root	a.	Sweet potato
ii.	Adventitious root	b.	Turnip
iii.	Stem	c.	Wheat
iv.	Fibrous root	d.	Potato

A. (i)-a, (ii)-b, (iii)-c, (iv)-d
B. (i)-b, (ii)-c, (iii)-a, (iv)-d
C. (i)-b, (ii)-a, (iii)-d, (iv)-c
D. (i)-d, (ii)-c, (iii)-b, (iv)-a

Answer 1

Hint: A tap root is a single main root that grows down whereas fibrous roots are the roots which are dense structures found closer to the soil. Adventitious roots are the roots which are not the true roots; they arise from any other organ like stem or leaf.

Complete Answer:
1. Tap root - It is found in trees. Special storage tap roots are found in turnip, carrot etc. These roots grow straight deep inside the soil. They are very thick and strong and tapes downwards. According to the question – Taproot-turnip (b).
2. Adventitious roots - These are not the true roots as they do not arise from the radical. Sweet potato is an example of adventitious roots which are modified for storage of starch. According to the question adventitious roots- Sweet potato (a).
3. Stem - It is the main part of the plant which bears leaves, fruits etc. For example potato is a modified stem. It contains an eye from which the leaf arises similar to the nodes. According to the question stem- potato (d).
4. Fibrous roots - The root is a thread like branching roots growing from the stem. All the members of the grass family have adventitious roots. For example wheat, maize, rice. According to the question fibrous roots- wheat (c).

The correct answer is C.

Note: Plants have modified roots for specific purpose apart from conduction and absorption of water. They change their shape and structure to perform functions like respiration, mechanical support, food storage, transport etc.