Question

Edible roots are found in
A. Rice
B. Wheat
C. Potato
D. Sweet potato

Answer 1

Hint: Sometimes roots in some plants undergo modification in their structure and shape is modified to perform a function other than the absorption of water and minerals. Edible roots are generally modification of root for storage. Modification of stems also occurs for storage.

Complete answer:
The roots perform mainly the function of absorption of water and minerals. But sometimes they are modified to perform various function one such function is the storage of food.
Storage roots: Storage roots are fleshy roots which store food material in them. Very often the aerial elements of this vegetation die out at some point of adverse seasons and, when the season turns into favourable once more, new buds sprout both from the underground fleshy root itself or from a small bit of stem above.
Some examples of modification of root for storage are given below.
Fusiform-These roots are swollen at the Centre ends and tapering towards both ends. Such types of roots present in reddish.
Napiform- These roots are very much swollen above, all of the sudden tapering towards the decrease end. Such roots are present in turnip and sugar beet.
Conical-These roots are broadest on pinnacle and steadily tampering toward the decrease stop. Such roots are present in carrots.
Tuberous root-In some plants like sweet potato roots arising from stems become swollen due to storage of food they do not have a regular shape that’s why these are called tuberous.
Nodulose roots-such types of roots are present in mango - ginger suddenly at the tips these roots become swollen and store food.

Hence, the correct option is sweet potato. It means option D.

Note: 1.Roots are positively geotropic.
2.Generally roots are present inside the soil but in some plants, Arial and subaerial roots are also present.
3.Fusiform, Napiform and conical roots are the modification of taproot.
4.Tuberous root in sweet potato is a modification of adventitious roots for food storage.
5.Nodulous roots are a modification of adventitious roots for food storage.
6.Potato is a modification of stems for food storage.