Let's Do Science 5 – Text Book A

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Growth h and nd Development Deve Organisms ms grow row and develop de as they get older. All off the stages in an organism’s life om first entering enteri the world, growing – from rger ger and developing develo develop larger new parts, to reproducing oducing you young of its own make up its life cycle. When the sex cells from a flowering plant are fert fertili fertilized, the fertilized cell develops iinto a sseed. Under the right conditions, the sseed eed will germinate and start to grow. It w will grow leaves and start to make its own ffood food. It will eventually develop flowers and fruits and go on to produce new plants of ffrui tth the same kind. W When multicellular organisms grow, tthey usually change in size and shape. T The number of cells that makes up their b bodies increases. U Unicellular organisms also grow and change shape as they get older. c T They usually get larger in size before rreproducing by dividing.

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