Plants possess a green material called chlorophyll,and in this respect they differ form forms of animal life. If we dig up a common garden weed such as shepherd’s purse wa shell be able to study its form and carry out experments in order to find out how the different parts function. Shepherd’s purse, which is an annual weed,may be found in flowers on cultivated ground at all seasons of the year. The plant consists of a stem with leaves,leaf buds,flowers and fruits,together with a root system below soid level.
THE LEAVES Much of the water taken in through the roots is given out by the leaves.
THE FLOWER AND ITS FUNTIONS in order to exist it is necessary for living things to reproduce themselves ad flower are the highest development of the reproductive system in plants เป็นสิ่งจำเป็นสำหรับการดำรงชีวิตในการ ผสมตัวเองและดอกไม้ยังถือเป็นการพัฒนา สูงสุดของระบบสืบพันธุ์ในพืช
The floral leaves may be spirally arranged but are often in circles or whorls around the receptacle.These whorls may be of four kinds.