Posted by maw2214
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Thursday, April 12, 2012
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Arthropods are the animals with a hard external skeleton like a suit of armour. The skeleton is jointed to allow movement. Arthropods have evolved in a different way to vertebrates and even their blood is
A marsupial is a mammal whose young are born in an extremely immature state. The newborn undergoes most of its development attached to one of its mother's nipples and nourished by her milk. Females of most
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