Question

Sucking roots are present in the plant
A) Betle
B) Cucusta
C) Mangifera
D) Solanum

Answer 1

Hint: Sucking roots are small roots which enter into the host plant. They help in absorbing water and minerals from the host plant.

Complete Answer:
For solving this question, we must know about the sucking roots and in which plants they are found.
Sucking roots are also called haustoria. The name is taken from a latin word haustor which means to drain. These types of roots are present in the parasitic plants. These roots penetrate into the host vascular bundle tissue xylem or phloem and suck the nutrients and water from the host.
For example-Cucusta. The plant is a complete parasitic plant. It gets its water and nutrients needed from the host.

1) In plants like betel, they have climbing roots which help them to hold firmly the host plant. They do not absorb any nutrient from the host.
2) In Mangifera, the root system consists of long tap roots which go deep inside the soil and absorb water and minerals for the plant. The root also develops sidewise as a surface feeder for absorption.
3) The root of Solanum is a tuberous root. Their root tubers are the deposits of starch which are commonly eaten as in the case of potatoes.

Thus the correct answer is (B) Sucking roots are present in Cucusta.

Note: Cucusta is a parasitic plant which lacks chlorophyll. Thus they cannot carry out photosynthesis. They use haustoria to suck water and other nutrients from the host plant. The mode of nutrition in Cucusta is heterotrophic.