Seeds are small packages that protect young plants. They have all the food the plant needs to start growing. Seeds come in many different shapes and sizes. This helps each seed survive in its own environment and spread without being eaten by hungry animals.
Seed shapes
The giant coco de mer seed is very big. It holds a lot of food so the new plant can grow tall and strong. The poppy seed is different. It makes many tiny seeds instead of one big seed. This helps more poppy plants grow. Some seeds have spiky coats, like the horse chestnut and the kiaat seed pod. The spikyots stop animals from eating them. Other seeds, like avocado and peach seeds, are very hard.Most animals can't chew them.
Sometimes, what we think is that seeds are actually fruits with seeds inside. Sunflower.coriander, and pot marigold are examples of this.
How seeds travel
Plants can't move from one place to another like animals can. They are held in place by their roots. If plants dropped their seeds right next to them, the new plants would have to fight for food and sunlight. So, plants have found many ways to spread their seeds far and wide. They use exploding seed pods, animals, the wind or even water to carry their seeds to new places to grow.