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Biology-science gr7 Nutrition in plants
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NOTEBOOKARADHYA DIVEDI
, Chapter - 1 Nutrition in plants
Introduction to Nutrition in Plants
Living and Non-Living Organisms
Living organisms like human beings, plants and animals need food to survive and exist.
Living organisms reproduce, respond to the environment and also adapt.
Living organisms respire and excrete as well.
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Cells
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Cells are tiny units that help make up a living organism. Hence, they are also called building
blocks of an organism.
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A cell is constituted of three major parts :
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A thin outer layer is called the cell membrane.
A spherical structure located at the centre of the cell is called a nucleus.
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A jelly-like substance that surrounds a nucleus called the cytoplasm.
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To know more about Cell,
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Single and Multi-Cellular Organisms
Organisms that are made up of just one cell are called single-celled or Unicellular
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organisms. E.g. Amoeba
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Organisms with more than one cell in their body are called multicellular organisms.
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All human beings, plants and animals are multicellular organisms.
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To know the difference between Unicellular and Muti-Cellular Organisms,
Nutrition
Nutrition is the mode of taking food by an organism and its utilisation by the body.
Nutrition is very important as the nutrients from the food consumed enable living
organisms to build their bodies and grow.
Nutrition helps to repair damaged parts and organs.
Nutrition also provides energy for carrying out various functions.
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