Question

What is friction?

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Answer 1

Answer:

the rubbing of one surface or thing against another

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Answer 2

Answer:

Cell is the basic structural and functional unit of all organisms.Robert Hooke in 1665 coined the term " cell " .Some organisms such as bacteria, Chlamydomonas etc have single celled body and are called as unicellular organisms.Some organisms have multicellular body and may have countless number of cells. Example: Human beings, animals plants etc.Cells divide to produce cells of their own kind. Cell has many organelles like, nucleus, mitochondria, chloroplast, lysosomes, plasma membrane etc

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Explanation:

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