The birth of primitive plants

1. Birth

Billions of years ago, algae appeared on Earth, and green algae was one of them. It is not much different from other algae. It does not have chlorophyll and can only rely on the external environment to absorb nutrients. Later, blue algae appeared in the ocean, and they were photosynthetic bacteria, which were strictly speaking the origin of plants. They could absorb sunlight and release energy for their own growth. Plants will gradually evolve from simple to complex, from aquatic to terrestrial. At first, algae appeared in the ocean, and as they grew and evolved, they gradually left the ocean. Note that if the division is based on binary boundaries, organisms will only be divided into plants and animals, so fungi are considered the earliest plants. If the division is based on other methods, then the birth of the primitive plants is algae.

2. Evolution

At first, algae were just single-celled plants. After a long evolution process, they evolved into multicellular algae, and their growth structure gradually became more complex. Later, due to the violent movement of the earth's crust, some of the original oceans evolved into land, and the algae in the ocean evolved into ferns, which could more easily adapt to the land environment. Later, because the climate on land is relatively dry, ferns will evolve into gymnosperms, and can completely get rid of their dependence on water.