Question
Give one use of lichen.
Give one use of lichen.
Lichens are very good pollution indicators-they do not grow in polluted areas.
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Which type of nutrition is found in animals?
Name the division which is known as "amphibians of plant kingdom".
Aphids are insect pests that attack plant such as mustard.
India has ______ Major river basins and ______ composite river basins that form the surface water resource.