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Asked by yolo to Anouk, Chris, Judith, Leisha, Seyyed on 14 Jun 2012.
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Chris Kettle answered on 14 Jun 2012:
cells are self contained units that can occur as single cells or may also occur within a bigger structure. In the case of humans and animals cells are the building blocks of tissues and organs. The have the control centre (Nucleus) poerplants (mitochondria) and factories (golgi apparatus). Cells are so small that you need a microscope to see them. Your science teacher may have shown you plant cells using an onion – if not ask for it.
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Judith Sleeman answered on 14 Jun 2012:
In biology, cells are the basic ‘units’ that make up animals humans and plants. We all develop from a single cell: a fertilised egg, but cells specialise as we develop by using different genes to become different types of cell in different organs.
Robert Hooke was the first person to name ‘cells’ in the 17th century, although he was looking at dead plant tissue, so he was really seeing the cell walls. He thought they looked like the cells that monks lived in in monasteries.
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