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pigments that occur in the brightly coloured, yellow, orange or red parts of the plant, such as leaves, flowers and fruit.
the blood vessel that carries blood from the digestive tract to the liver.
thin layer of living tissue between the xylem and the phloem, which is able to divide to make...
organisms that feed on dead organic matter and thereby release nutrients back into the soil.
the replacement of liver tissue by scar tissue due to damage to liver cells caused by excessive...