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Card 16

Front

What is natural selection?

Back

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Card 17

Front

3 key points of Charles Darwin's theory of evolution by natural selection

Back

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Card 18

Front

Where does fertilisation occur in flowering plants?

Back

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Card 19

Front

What happens during fertilisation in plants?

Back

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Card 20

Front

How many nuclei are there in the pollen tube?

Back

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Card 21

Front

What happens when the tube reaches the ovary?

Back

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Card 22

Front

What is a micropyle?

Back

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Card 23

Front

What happens in the embryo sac?

Back

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Card 24

Front

What does one male nucleus do?

Back

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Card 25

Front

WHat does the second male nucleus do?

Back

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