1.Define: cell, tissue, organ, organ system, …

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1.Define: cell, tissue, organ, organ system, diffusion, unicellular organisms and multi cellular organisms 2.Autotropic and netertropic nutrition. 3.Formula of glusose. 4.Why do we need nitrogen? 5.Name the bacteria which helps in nitrogen fixation. 6.Why are molecular movements needed for life?

Posted by Pramod Gowda B R 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 8 months ago

Cell is an autonomous self-replicating structure that forms the structural, functional and biological unit of all living organisms.
The movement of dissolved molecules from a region of higher concentration to a region of lower concentration is called diffusion.
A group of specialized cells with similar structure, working together to perform a common function is called a tissue.
Nutrition characterized by the ability to use simple inorganic substances for the synthesis of more complex organic compounds, as in green plants and some bacteria is called autotrophic nutrition.
Autotroph is an organism capable of synthesizing its own food from simple inorganic substances, using light or chemical energy.
A type of nutrition in which energy is derived from the intake and digestion of organic substances, normally plant or animal tissues is called heterotrophic nutrition.
Heterotroph is an organism that cannot synthesize its own food and is dependent on complex organic substances for nutrition.

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CBSE > Class 10 > Science