Previous year MCQs

General science UPPSC 2018 GS-I
Question

Consider the following events.

1. First reptiles
2. First insects
3. Shelled animals
4. First mammals

Arrange the above events in Chronological order of their origin on the earth and select the correct answer from the codes given below:

Codes:

Answer & Solution

Answer: (Detailed Solution Below)

Option C: 3 2 1 4

Detailed Solution:

The correct answer is “3 2 1 4”.
Type Time (Million Years Ago)
Shelled animals 540
First insects 400
First reptiles 310
First mammals 200

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