1. Concentrated salt solution is a hypertonic solution so causes irritation and excessive dehydration in the wall of alimentary canal dr.ie to exosmosis. There is uncomfortable stretching which causes reverse movements and hence vomiting.

    Concentrated salt solution is a hypertonic solution so causes irritation and excessive dehydration in the wall of alimentary canal dr.ie to exosmosis. There is uncomfortable stretching which causes reverse movements and hence vomiting.

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  2. Clothes are washed with soap or detergent solution. This solution is hypertonic as compared to osmotic concentration of our skin cells. The washing solution, therefore, results in exosmosis in the skin cells that come in contact with it for some time. Due to this reason, the skin over the fingers shRead more

    Clothes are washed with soap or detergent solution. This solution is hypertonic as compared to osmotic concentration of our skin cells. The washing solution, therefore, results in exosmosis in the skin cells that come in contact with it for some time. Due to this reason, the skin over the fingers shrinks while washing
    clothes for a long time.

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  3. Yes, cell is a building unit of every living organism as every living being is made up of one or more cells. For example, in unicellular or acellular organisms, the single cell performs all the functions of life. In multicellular organisms all the cells have a similar basic structure and perform a sRead more

    Yes, cell is a building unit of every living organism as every living being is made up of one or more cells. For example, in unicellular or acellular organisms, the single cell performs all the functions of life. In multicellular organisms all the cells have a similar basic structure and perform a similar basic life activities. However, they become specialised to form components of different structures that perform different functions. Cells are first organised into tissues, each with a specific function, e.g., contraction by the muscular tissue. Tissues are organised to form organs with each organ performing a specific task, e.g.’ heart, kidney, lung, stomach, eyes. Organs are grouped into organ systems, each with a major function, e.g.’ circulatory, system, excretory system, respiratory system, digestive system, skeletal system. A living organism has a number of organ systems. Thus, in all such organisational complexity, cell remains the basic building unit of the organism.

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  4. There are six major controls of the climate of any place viz., latitude, altitude, pressure and wind system, distance from the sea, ocean currents and relief features. (i) Latitude: Due to the curvature of the earth, the amount of solar energy received differs according to latitude. Thus, air temperRead more

    There are six major controls of the climate of any place viz., latitude, altitude, pressure and wind system, distance from the sea, ocean currents and relief features.
    (i) Latitude: Due to the curvature of the earth, the amount of solar energy received differs according to latitude. Thus, air temperature decreases from the equator towards the poles.
    (ii) Altitude: At the higher altitude, the atmosphere becomes less dense and temperature decreases. The hills are, therefore, cooler during summers.
    (iii) Pressure and wind system: It depends on the latitude and altitude of the place. Thus, it too influences the temperature and rainfall pattern.
    (iv) Distance from sea: Sea has its moderating influence on climate. As such when the distance from the sea increases, people experience extreme weather conditions.
    (v) Ocean currents: These currents affect the climate of the coastal areas because any coastal area with warm or cold currant will be warmed currant if the winds are onshore.
    (vi) Relief: Relief too affects the climate of a place. For example, high mountains act as barriers for cold and hot winds. They may cause precipitation if they are high enough and lie in the path of rain-bearing winds. The leeward side of mountains remains dry.

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  5. Ans. The main facts that are important to understand the mechanism of the monsoon are given below: (a) The differential heating and cooling of land and water creates low pressure on the landmass of India while the seas around experience comparatively high pressure. (b) The shift of the position of IRead more

    Ans. The main facts that are important to understand the mechanism of the monsoon are given below:
    (a) The differential heating and cooling of land and water creates low pressure on the landmass of India while the seas around experience comparatively high pressure.
    (b) The shift of the position of Inter Tropical Convergence Zone (ITCZ) in summer, over the Ganga plain (this is the equatorial trough normally positioned about 5° N of the equator -also known as the monsoon-trough during the monsoon season).
    (c) The presence of the high-pressure area, east of Madagascar, approximately at 20°S over the Indian Ocean. The intensity and position of this high-pressure area affects the Indian Monsoon.
    (d) The Tibetan plateau gets intensely heated during summer which results in strong vertical air current and the formation of high pressure over the plateau at about 9 km hove sea level.
    (e) The movement of the westerly jet stream to the north of the Himalayas and the presence of the tropical easterly jet stream over the Indian peninsula during summer.
    (f) Changes in the pressure conditions over the southern oceans also affect the monsoon Normally when the tropical eastern south Pacific Ocean experience he pressure, the tropical eastern Indian Ocean experience low pressure

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