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Question
Identify the correct option
Identify the correct option
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Solution
The correct option is D Invertebrates were formed-Around 500 mya
Evolution of Jawless fishes-Around 350 mya
Evolution of fish-like reptiles-Around 200 mya
Life originated on this planet almost four billion years ago. The first cellular form of life might have originated about 2000 million years ago. The first cellular forms evolved into the complex life forms that we see today.
The paleontological evidences (fossils) help us to understand the evolution of various life forms. The various fossils preserved in the various rocks reveal that invertebrates (non-chordates) were formed about 500 million years ago (mya).
The jawless fishes probably evolved around 350 mya. The jawless fish are included in the group agnatha. Extant jawless fishes are the lampreys and hagfishes.
At about 200 mya, some terrestrial reptiles went back into water and evolved into fish like reptiles. e.g., Ichthyosaurs
Dinosaurs are giant reptiles that lived on our planet many millions of years ago. Around 65 million years ago, they suddenly disappeared from the Earth. It was a mass extinction, extinction of a large number of animals. Dinosaurs were completely wiped out marking the dawn of a new age. It is believed that the extinction took place when a massive asteroid hit the earth’s surface leading to immense changes in the atmosphere, sea levels and temperatures that ended life on the Earth.
Evolution of Jawless fishes-Around 350 mya
Evolution of fish-like reptiles-Around 200 mya
Life originated on this planet almost four billion years ago. The first cellular form of life might have originated about 2000 million years ago. The first cellular forms evolved into the complex life forms that we see today.
The paleontological evidences (fossils) help us to understand the evolution of various life forms. The various fossils preserved in the various rocks reveal that invertebrates (non-chordates) were formed about 500 million years ago (mya).
The jawless fishes probably evolved around 350 mya. The jawless fish are included in the group agnatha. Extant jawless fishes are the lampreys and hagfishes.
At about 200 mya, some terrestrial reptiles went back into water and evolved into fish like reptiles. e.g., Ichthyosaurs
Dinosaurs are giant reptiles that lived on our planet many millions of years ago. Around 65 million years ago, they suddenly disappeared from the Earth. It was a mass extinction, extinction of a large number of animals. Dinosaurs were completely wiped out marking the dawn of a new age. It is believed that the extinction took place when a massive asteroid hit the earth’s surface leading to immense changes in the atmosphere, sea levels and temperatures that ended life on the Earth.
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