Hello everybody! Here it is the main information of Unit 4. Plant Kingdom. Good luck! 1. CLASSIFICATION OF PLANTS: The Plant Kingdom includes more than 250 000 species. All these plants can be classified into two main groups : flowering and non-flowering plants. FLOWERING PLANTS Flowering plants are the biggest group of plants on Earth. Most flowering plants use sexual reproduction (they grow flowers which are their reproductive organs). These plants reproduce through seeds and produce them in two different ways: - Angiosperms : pollinated flowers produce fruits with seeds inside. Examples: roses, cherry trees, blackberries, rice ... - Gymnosperms : have small flowers. They don’t produce any fruit and their seeds develop in cones . Many gymnosperms, such as pine trees, have long thin leaves called needles . ...