Question

Read the following statements about ‘terror of Bengal’ and select the correct ones
(i) ‘Terror of Bengal’ is the name given to water hyacinth (Eichhomia), algae
(ii) Eichhomia was introduced in India due to its aesthetic value
(iii) Eichhornia drains oxygen from water which leads to the death of fishes.
(a) i & ii
(b) i & iii
(c) ii & iii
(d) i, ii & iii

Answer 1

Hint: The leafstalk is inflated and spongy, and the upper lobes of the purple flowers have blue and yellow markings. It is an exotic shrub that strongly competes with the native species and has also eliminated many of them. It originated in the Amazon basin and is now grown in ornamental garden ponds across the world.

Complete answer:
Water hyacinth or "Terror of Bengal" is an aquatic plant that is one of the most attacking weeds discovered developing in the standing water. It is additionally called as "blue devil" as it takes oxygen from the water which causes the death of fishes. This plant was presented in India for its excellent blossoms and the shape of leaves. It can propagate vegetatively at a quick rate and spread everywhere on the water body in a brief time. It is extremely hard to eliminate it from the water body.
Water hyacinth is incredible in using and consuming oceanic supplements and sunlight for the purpose of biomass production. This prompts a decrease in various fishes and individuals to face a shortage of fish. Due to this shortage of fish in Bengal caused by water hyacinth or Eichhornia crassipes, the water hyacinth is also called Terror of Bengal.
Eichhornia was acquainted in India due to its aesthetic value and it additionally drains oxygen out of the water which prompts the death of fishes.

So, the correct answer to the above question is ‘ii & iii’.

Note:
Water hyacinth can drift on the water without being appended to the base. The plant develops at a very quick rate; since it is asexual, and it can reproduce without depending upon insect or wind pollination for fertilization. It has given the right conditions to develop, including a warm temperature and a high dampness level, the water hyacinth can reproduce continually, covering colossal regions, for example, the surface of a lake.