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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
Fill in the following blank with suitable word :
The science that deals with the inter-relationships of living things with one another and their environment is called...........
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?
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
Write the percentage of solar energy captured by the autotrophs.
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.?
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.
book.
Classify the following as natural or man-made.
pen
Classify the following as natural or man-made.
brick
Take a square paper. Fold its diagonals. Draw three lines in three triangles as shown in the picture.
Cut from the edge of the diagonal to the center as shown in the picture.
If you fold this triangle and paste it behind the third triangle you get a pyramidal shape.
In one of the triangles, draw images of each of the organisms in the different levels.
In another triangle write the names of the organisms. In the last triangle, write the energy level of the organism. Have a look at the following example. You must come up with different organisms!.
These are abiotic factors.
- Sunlight
- Bacteria
- Air
- Plants
Suggest one word for the following statement/definition.
The physical and biological world where we live in
Select the mis-matched pair in the following and correct it.
The abiotic factors are the non-living parts such as sunlight, air, water, and minerals in the soil.
