Q. Jawless fishes were originated around
Solution:
500 mya Origin of Invertebrates . 350 mya Origin of Jawless fishes . - It is of common opinion that the first organisms that invaded land were plants. 320 mya Origin of Sea weeds and few other plants. 200 mya - Some land reptiles (the dinosaurs) went back into water and evolved into fish like reptiles (e.g. Ichthyosaurs). 65 mya - Sudden disappearance of dinosaurs from the earth. Probable reasons : Climatic changes / Evolution of most of them into birds / etc. - Small sized reptiles of that era are still existing today.
| 500 mya | Origin of Invertebrates . |
| 350 mya | Origin of Jawless fishes . - It is of common opinion that the first organisms that invaded land were plants. |
| 320 mya | Origin of Sea weeds and few other plants. |
| 200 mya | - Some land reptiles (the dinosaurs) went back into water and evolved into fish like reptiles (e.g. Ichthyosaurs). |
| 65 mya | - Sudden disappearance of dinosaurs from the earth. Probable reasons : Climatic changes / Evolution of most of them into birds / etc. - Small sized reptiles of that era are still existing today. |