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Year 9 iGSCE - Biology Cells

All living organisms on earth are made of cells. Tiny microscopic factories which create the diverse range of life you see today.

But what exactly constitutes life? What makes something's living and something non-living?

Every living organism has the following characteristics:


Living organisms can move and change their position.


Living organisms can make more of the same kind of organism as themselves.


Living organisms can detect or sense stimuli and respond to them.


Living organisms can increase their size or dry mass by increasing the number or size of their cells.


Living organisms can create chemical reactions that break down nutrient molecules in living cells to release energy.


Living organisms can excrete toxic materials, waste products of metabolism, and excess substances


Living organisms can take in and absorb nutrients such as organic substances and mineral ions. These nutrients contain the raw materials or energy needed for growth and tissue repair

Now that we know what the basic requirements to be classified as living are, what is a cell?

Lets look at the basic parts which make up a cell