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Yogita Ingle 7 years, 1 month ago
Yes, it can. A shadow is caused by the interruption of light from a single source. If you have more than one light source, you can have more than one shadow. Some shadows may not be as distinct (diffused light, shadow on brightly lit surfaces, etc.), and multiple shadows will practically always overlap to some extent.
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Gaurav Seth 7 years, 1 month ago
The dicotyledons are also known as dicots. They are the groups into which all the flowering plants or angiosperms were formerly divided. The name dicotyledons refer to the seed having two embryonic cotyledons. There are around 200,000 species of dicotyledons.
In dicotyledons, the embryo consists of an embryo axis and two cotyledons. Cotyledons are generally swollen part which acts as a food reserve for the developing seedling. The embryo axis has two ends. The one which forms the shoot tip is called plumule and the portion at the lower end which forms the root tip is called radicle. The whole content is enclosed within a protective cover, seed coat. The seed coat is made up of an outer layer called testa and an inner layer called tegmen. And a seed is attached to the fruit through a structure called hilum.
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Yogita Ingle 7 years, 1 month ago
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Biodegradable wastes |
Non-biodegradable wastes |
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1. These wastes can be broken down into non-poisonous substances by the action of microorganisms like bacteria and earthworms. |
1. These wastes cannot be broken down into harmless substances by any biological processes. |
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2. Biodegradable substances change their form and structure over time and become harmless. |
2. Non-biodegradable substances remain unchanged over a long period of time. |
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3. They do not pollute the environment. |
3. Some of them remain inert and begin to accumulate in our surroundings, while others cannot be made less toxic easily and hence keep on polluting the environment. |
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Examples: Spoilt food, vegetable peels, tea leaves, wood, grass, paper, leather, cotton, cattle dung etc. |
Examples: Glass bottles, metal cans, polythene bags, synthetic fibres, radioactive wastes, plastics and pesticides like DDT etc. |
Posted by Aastha Karodi 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Seal the end of a plastic water bottle. insert the needle of a large syringe into the bottle. Seal around the needle with gum. You will then be able to draw the air from the bottle into the syringe. The bottle will collapse due to the air occupying the space being removed. You can the inject the air back into the bottle and watch the opposite affect.
Posted by Manisha Soni 7 years, 1 month ago
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Posted by Ambika Dahale 7 years, 1 month ago
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Scientist, Hritik 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
Functions of a Stem:
• It holds leaves in position and helps them to spread out as the stem and its branches grow. This ensures that they get enough light for photosynthesis.
• It bears flowers, buds, leaves, and fruits.
• It conducts water and mineral salts from the roots to the leaves.
Similarly, it carries the food manufactured by the leaves to other parts of the plant.
• Green stem has chlorophyll and can carry out photosynthesis.
• It has nodes from which leaves arise.
Posted by Ambika Dahale 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Functions of a Stem:
• It holds leaves in position and helps them to spread out as the stem and its branches grow. This ensures that they get enough light for photosynthesis.
• It bears flowers, buds, leaves, and fruits.
• It conducts water and mineral salts from the roots to the leaves.
Similarly, it carries the food manufactured by the leaves to other parts of the plant.
• Green stem has chlorophyll and can carry out photosynthesis.
• It has nodes from which leaves arise.
Posted by Hemant Kumar 7 years, 1 month ago
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Mayank Balyan 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
There are two types of magnets: temporary and permanent. Magnets that retain their magnetic properties only for a short period of time are called temporary magnets. Magnets that retain their magnetic properties for a long period of time are called permanent magnets.
Temporary magnets are usually made of iron, cobalt, or nickel. These materials behave like magnets only when they are near a strong magnet. They quickly lose their magnetic property if the influence of the strong magnet is removed.
Posted by Vijaya Kapoor 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The resources which are used by mankind from the starting of human life. Our ancestors used these resources for lighting purposes, transportation, shelter, cooking, heating, protection from wild animals, etc. Renewable resources are also called as ‘Non-Conventional’ sources of energy. Few examples of renewable resources are sun, wind, tidal energy, forests, mountains, soil, water bodies, animals and wildlife resources, atmospheric resources and lot more.
Posted by Kartikey . 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
We know that Earthworm are regarded as a friends of farmer. They are also called as natural plough man. Due to their boring habit, they help in soil aeriation. It feeds on dead and decaying organic matter present in soil and egest compost (Vermicompost) as a worm casting. Compost obtained from earthworm (vermicompost) is very fertile. It contain all the essential nutrients for plant like Nitrogen, Phosphorous, Potassium, different minerals, plant growth hormones, etc. that enhance plant growth, suppresses disease in plants, increases porosity and microbial activity in soil, and improves water retention and aeration. Vermicompost also benefits the environment by reducing the need for chemical fertilizers. Thus, Earthworm are good for the plants.
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Mansi ??⚘?? 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Magnets are made in different shapes and they are named according to the shape, e.g. bar magnet, dumb-bell shaped magnet, horse-shoe magnet, cylindrical magnet, etc.
Natural Magnet: Magnet which is found naturally is called natural magnet.
Artificial Magnet: Magnet which is made by humans is called artificial magnet.
Posted by Deekshitha P 7 years, 1 month ago
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Deekshitha P 7 years, 1 month ago
Posted by Isha Mahindru 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The changes which take place in the body of an organism during acclimatisation are temporary and can be reversed. On the other hand, the changes which take place during adaptation are permanent and cannot be reversed.
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Udayan Jaiswal 7 years, 1 month ago
4Thank You