Arrange the following in chronological order of its origin 1 Frogs and Turtles 2 Unicellular B...........

Geography NCERT

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Arrange the following in chronological order of its origin:

1.Frogs and Turtles.

2.Unicellular Bacteria.

3.First Reptiles.

4.First Fish.

Select the correct answer from the codes given below:

2-4-3-1

2-3-4-1

2-4-1-3

4-2-3-1

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Explanation:

·Unicellular Bacteria are formed during Pre-Cambrian era or 2500-3800 million years ago.

·First Fish originated in the Ordovician period or Palaeozoic era or 438-505 million years ago.
·First Reptiles originated in the Carboniferous period or Palaeozoic era or 286-360 million years ago.
·Frogs and Turtles originated in the Triassic period or Mesozoic era or 208-245 million years ago.