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Fertilisation and the development of the zygote
EduBook Organización
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This diagram shows how a fetus is formed. Firstly, a zygote is formed from the fertilisation of an ovum from a woman by a sperm from a man. The zygote then splits into more and more cells. It develops…
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Think about it. The nature of light
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Remember what you have studied in this section and answer the questions: Look at the diagram of electromagnetic waves. State what happens to the wavelength, frequency and energy as you go from left to…
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Let's learn how to... - Human beings
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Make a ribcage What do we need? A cardboard tube. Stiff card. Scissors, glue, sticky tape and a stapler. Card in three different colours: red, blue and yellow. What do we do? Look carefully at the…
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Think and answer. Spermatozoids
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Look at the diagram on the right. It shows the sexual reproduction of Sargasso seaweed, found in the Atlantic Ocean. Each spermatozoid has two small tails to help it swim to the ovules. What do the…
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