Question

What is the first plant on earth?

Answer 1

First plant on earth:

1. About 470 million years ago, when life was rapidly evolving, during the Ordovician epoch, the first terrestrial plants first arose.
2. Liverworts and mosses were shallow-rooted non-vascular plants.
3. In the form of spores with decay-resistant walls, the earliest terrestrial plants were discovered in lower-middle Ordovician rocks from Gondwana and Saudi Arabia around 470 million years ago.
4. They needed the land to be inundated in order to survive.
5. Due to the presence of sporopollenin in their walls, they are embryophytes.
6. It's possible that eukaryotes were earlier unable to colonize the land due to air 'poisoning,' or that the necessary complexity needed a very long period to evolve.

Characteristic feature of the first plant:

1. The earliest land plant megafossils were thalloid organisms, which covered a large portion of an early Silurian floodplain and inhabited river marshes
2. The microstructure of the cryptospores, which were produced singly (monads), in pairs (dyads), or in groups of four (tetrads), was comparable to that of contemporary liverwort spores, suggesting that they are similarly organized.