Root and Root modifications- Practice Test 5

Answer: Option A

Explanation

Fibrous or adventitious root system is mostly found in monocot plants. The following are the characteristic features of these roots:

• This is the most common type of root system found in monocotyledonous plants and pteridophytes.

• In this type of root system, the radicle is short lived and gets degenerated after some time. Later a number of fiber-like new roots develop from the base of the stem.

• As these roots develop from parts of the plant other than radicle, this is called adventitious root system.

• A bunch of uniform roots arise from the base of the stem.

• These roots are slender, shallow and develop equally.

• All the roots look like fibers and hence the name fibrous roots.

Answer: Option B

Explanation

The edible part of the sweet potato is the root. The roots of sweet potato are adventitious tuberous roots. These roots store food material, become swollen and attain tuber like shape.

Answer: Option C

Explanation

The following is the correct order of zones from root apex, 1. Meristematic Zone 2. Water absorption Zone 3. Mineral absorption Zone 4. Maturation Zone Hence option 3 is correct.

Answer: Option B

Explanation

In Amorphophallus, vegetative reproduction occurs through corm. Amorphophyllus has adventitious roots with the capacity to contract. These roots are called as contractile roots. As they contract, the corm is puffed down. Thus the level of the corm is maintained. The buds present on corm give rise to new aerial shoots.

Answer: Option B

Explanation

Radish (Raphanus sativus) is an example of fusiform shaped storage root. It is kinf of modified tap root. After the storage of the food, radish attains fusiform shape (swollen in the middle and gradually tapering towards both ends).