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There is a huge variation in the types of living things that exist on the earth. There are animals and plants that are made of only one cell e.g. the amoeba (an animal) and some algae (plants) and massive animals and plants such as the whale and the tree.
Useful Link:
http://www.planet-pets.com/plntamba.htm
Amoeba:
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Whale:
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| Photo courtesy of Planet-Pets.com http://www.planet-pets.com | Photo: © Tony Newlin |
Within one type of living thing, e.g. man, there is also great variation
so that no two people are exactly the same (except when twins have grown
from the same fertilised egg).
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