6-10 ┊ 8243 words ┊ ◄))
6-10, 8243 words, 1 hour 4 minutes audio time.
It seems obvious that a pig will never give birth to a puppy, but why should that be the case? Variation in Living Things explains the causes and limits of variation in species – such as blood groups and disposition to disease – and why it is so important to their survival. It tackles common confusions about the science and shows how topics are relevant to the reader.
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