Plants are very important to living things. Life can not go on if there are no plants. This is because plants can make food from air, water and sunlight. Animals and human beings can not make food from air, water and sunlight. Animals get their food by eating plants and other animals. Therefore, animals and human beings need plants to live. This is why we find that there are so many plants around us.
If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering plants and non-flowering plants. Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed, some have two and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit.
Most non-flowering plants do not grow from seeds. Many of them grow from spores(孢子). Spores are very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as seeds. When these spores fall on wet and shady places, they usually grow into new plants.