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Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
Persian leopard (Panthera pardus ciscaucasica), also called Caucasian leopard
pH Values of Some Familiar Substances
The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.
Cystic fibrosis is caused by a mutation in a protein called CFTR
Different forms of a gene are called alleles