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regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
specialised proteins which catalyse chemical reactions and thereby speed up chemical reactions...
the blood vessel that carries blood from the digestive tract to the liver.
compounds such as lipids, carbohydrates, proteins, nucleic acids, vitamins, petrochemicals and...
moulds that generally infect the leaves of many plants, including crop plants, such as wheat and...
(also called autotrophic organisms) organisms that produce their own organic food, mainly...