(7) Draw a tree diagram The system of classification in which the living organisms are classified into two kindgdoms is called two kingdom system of classification. It includes plant kingdom two sub-kingdom. The plant kingdom is divided into two sub-kingdom i.e. cryptogamia, and phanerogamia. Cryptogamia is a group of non flowering and non- seed bearing plants. It is further classified into three groups as thallophyta. Bryphyta and pteriodophyta. The plant body of thallophyta is thallus. The plant body olbryophyta is thalloid or leafy and that of pterigophyta is with organ. Algae and fungiare included in thallophyta phanerogamia is a group of flowering and seed bearing plants. The plants which produce the naked seeds are called Gymnospermane and the plants which produce the seeds enclosed within fruits are called Angiospermane. Angiosperm are further classified into two groups.i.c. Dicotyledonge and monocotyledonae. There are two cotyledone in seed in dicotyledonae and one cotyledon in monocotyledonae and one cotyledon in monocotyledonae plants.
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