CBSE Class 9 Answered

Higher  plants are often divided into two main groups: angiosperms and  gymnosperms. Angiosperms include all flowering plants which are often again divided into  monocotyledonous and dicotyledonous plants. Both gymnosperms and angiosperms have vascular tissue and both produce seeds. However, the seeds of angiosperms are surrounded by the wall of the ovary of the flower which forms the fruit, whereas gymnosperms do not possess this structure. Their seeds are described as naked (Gymnosperm from the Greek: gymnos - naked, sperm - seed). Botanists place the angiosperms in the group (division) Angiophyta but the Gymnosperms do not form a coherent group and are separated into four divisions.