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प्रश्न
What’s the solution?
We have to remove insects from the grain without using insecticides.
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उत्तर
- Let the grain dry in the sunlight. The harsh sunlight does not allow eggs and caterpillars to grow in the grain.
- Keep dried neem leaves in the container in which the grains are stored. Neem acts as a repellent for insects.
- Grains like beans are smeared with mud. The mud particles keep the weevils away from infesting the grains.
- The place where grain is stored should be cool and dry. It should be airy. The chances of insect infestations are less in such storage places.
संबंधित प्रश्न
You being an environmentalist are interested in contributing towards the conservation of natural resources. List four activities that you can do on your own.
The number of malaria patients in a village increased tremendously when large number of frogs were exported from the village. What could be the cause for it?
Write one or two word for the following statement/definition :
The physical and biological world where we live in
Name the organisms whose uncontrolled activities are damaging the environment.
The use of one of the following will pollute the environment. This one is :
(a) paper carry bags
(b) cotton cloth carry bags
(c) nylon cloth carry bags
(d) jute carry bags
What makes the earth’s atmosphere a heterogeneous mixture?
In the course of your observations, did you notice any signs of the presence of living things, though the living things themselves were not seen? For example, did you notice any partly eaten fruits or shells, fallen feathers, animal tracks, dung, droppings, nests, cocoons, eggs, honeycombs, etc.?
What substances in the soil are useful for the growth of plants?
Micro-organisms form a part of the environment.
Classify the following as natural or man-made.
Soil.
Classify the following as natural or man-made.
horse.
Classify the following as natural or man-made.
stone.
Classify the following as natural or man-made.
dolphin
Classify the following as natural or man-made.
trees
Producers are ________.
Excessive exposure of humans to UV-rays results in
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
Suggest one word for the following statement/definition.
The physical and biological world where we live in
The abiotic factors are the non-living parts such as sunlight, air, water, and minerals in the soil.
