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Yogita Ingle 7 years, 6 months ago
Crocodile is the reptile that has four chambered heart. Four chambered heart means that heart that has four chambers i.e the right and left atrium and the right and left ventricle.
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Yogita Ingle 7 years, 6 months ago
When sunlight hits the ocean, the water strongly absorbs long-wavelength colors at the red end of the light spectrum, as well as short-wavelength light, including violet and ultraviolet. The remaining light that we see is mostly made up of blue wavelengths.
Posted by Aanvi Sharma 7 years, 6 months ago
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Yogita Ingle 7 years, 6 months ago
- Acts as a binding tissue.
- Bind the skin with muscles.
- Bind the blood vessels and nerves with other structures of body.
- Helps in healing of wounds.
- It fills the space inside the organs, thus acts as a packing tissue between the organs.
- It supports many delicate organs in the body.
- It plays role in repair of tissues.
Posted by Aanvi Sharma 7 years, 6 months ago
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Yogita Ingle 7 years, 6 months ago
Vertebrates are classified further into sub-groups on the basis of simple to complex forms of structures and their functions. Examples. Pisces, amphibia, reptilia, aves and mammals.
Pisces: They are aquatic, cold blooded animals. Their heart has two chambers. Their body is covered by scales or plates. They lay eggs and perform respiration through gills. Their endoskeleton is made up of cartilage. e.g. Fishes
Amphibians: They are cold blooded animals and live in both water and land. Respiration is through gills, lungs, skin. They have three chambered heart. e.g. Frogs.
Reptiles: They are cold blooded animals. They have three chambered heart and they breathe through lungs.
Aves: They are warm blooded animal, oviparous vertebrates covered with feathers. They have a four chambered heart and perform respiration by lungs. e.g. Birds
Mammals: They are warm blooded animal with four chambered heart. They are viviparous and possess characteristics like pinna and hair on skin and canine. e.g. Humans
Posted by Aman Mangat 7 years, 6 months ago
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Yogita Ingle 7 years, 6 months ago
Distillation is a widely used method for separating the component substances from a liquid mixture by selective evaporation and condensation. To separate a mixture of liquids, the liquid can be heated to force components, which have different boiling points, into the gaseous state.
In industrial chemistry, distillation is a unit operation of practically universal importance, but it is a physical separation process and not a chemical reaction. Distillation is used for many commercial processes, such as the production of gasoline, distilled water, xylene, alcohol, paraffin, kerosene, and many other liquids.
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Yogita Ingle 7 years, 6 months ago
Cryptogamaeincludes plants with hidden reproductive organs and plants do not bear flowers or seeds.
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Yogita Ingle 7 years, 6 months ago
The SI unit of energy is the same as that of work, i.e. Joules (J) which is nothing but a term for newton-meter. we use a bigger unit called kilowatt hour (kWh) to express energy. 1 kWh is the amount of energy consumed by an electrical gadget in one hour at the rate of 1000 J/s or 1kW.
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Sonali Aggarwal 7 years, 6 months ago
Manure can be described as a natural substance, derived from the decomposition of animal dung or crop residue.The matter so obtained after decomposition is called organic manure. It is rich in organic material but contains little amount of plant nutrient. Manure is considered very helpful in increasing the fertility of the soil, by enhancing its capacity to retain water, by improving the texture of the soil, and by increasing the number of friendly microbes. Moreover, manure makes the soil porous, that facilitates the exchange of gases.
As it is evident from the name, fertilizer is a natural or synthetic substance that contains a lot of plant nutrients which are necessary for the growth and productivity of the plants. It is applied to the soil to increase the yield of crops, like wheat, maize, paddy, etc.There are two types of fertilizers, i.e. organic fertilizer and synthetic fertilizer. Organic fertilizers are the ones made up of natural material like composted plant materials, peat moss, bone, seaweed etc. Synthetic fertilizers are the inorganic ones that are industrially manufactured chemicals, which easily dissolve in water and are used by plants instantly as they are added to the soil.
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Yogita Ingle 7 years, 6 months ago
AIDS stands for Acquired Immune Deficiency Syndrome and is caused by a virus called HIV (Human Immunodeficiency virus). AIDS is the final stage of the infection caused by the HIV virus. This virus mainly effects or damages the immune system of a person (the system which fights against diseases).
A–acquired: it is not inherited from the parents and you can get infected with during your life time.
I–Immune: Your body's immune system includes all the organs and cells that work to fight off infection or disease which weakens the immune system.
D–Deficiency: You get AIDS when your immune system is deficient, means there is weakness in the body’s system that fights the diseases or the immune power of the body is insufficient to fight against diseases.
S–Syndrome: A syndrome is a collection of symptoms and signs of any disease. AIDS is a syndrome, rather than a single disease, as it is a complex illness with a wide range of complications and symptoms.
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