life cycle of plants
CHONG YANG JINGにより
1. life cycle of a tomato plant
1.1. most of the plants grow from seed
1.1.1. plants needed Air,Water and Warmth to grow to a healthty plant
1.1.1.1. as the seed grows it get its food from the seed leaves
1.1.1.1.1. when the true leaves appear the seed leave will drop the plant,because the young plant can make its own food.