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Give three animals with scales
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Give three animals with beaks
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Describe how plants are sensitive to their environment.
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What is a chromosome?
a length of DNA, it contains the genes
Give three examples of things your genes determine
examples: eye colour, hair texture, shape of nose, genetic diseases...
Humans have either XX or XY chromosomes. Which do females have?
XX
Describe an example of natural selection.
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Describe an example of selective breeding.
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