Question

Which one of the following is a bio-indicator of air pollution.
A. Fern
B. Lichen
C. Money plant
D. Dodder

Answer 1

Hint: One of the given organisms is well known as a sensitive indicator of air contamination, especially for sulfur dioxide. Zones with its high population are lower in air contamination and water contamination. It would thus be able to be utilized as a reliable natural indicator of water and air contamination.

Complete step by step answer:
-Ferns: A fern is a group of a vascular plant. They reproduce via spore and have neither seed, not flowers. Leaves of ferns are known as Fronds.
-Lichens are generally useful in identifying sulfur dioxide contamination however can likewise be utilized in recognizing radioactive components and other harmful mixes. Lichen is sensitive to both air and water contamination. They get the greater part of their fundamental supplements from the air in the general climate rather than the soil because of which they collect the poisons present in the air on a fungal thread.
-Money plant: Money plant is south-eastern European plant. This plant is generally kept as a smaller person in the house yet can be developed in the nursery as well. The conviction is that while it flourishes, one could never be shy of cash.
-Dodder: Scientific name of the dodder is Cuscuta, which lacks chlorophyll. Dodder is used for medicinal purposes, to treat hepatic disorders, cancer, depression, pain etc.
Hence, the correct answer is option (B) Lichen.

Note: Lichen is sensitive to sulfur dioxide gas. The extraordinary sensitivity of lichens to sulfur dioxide is incompletely related to their capacity to retain more sulfur dioxide for a given concentration than normal vascular plants. The utilization of lichens as long term integrators of elemental deposition patterns is well established, but their use for monitoring dry deposition has only recently been recognized.