Evolution Of Plants And Animals PYQs — 10 UPSC CSE Previous Year Questions

Question 1

Consider the following statements : The Earth's magnetic field has reversed every few hundred thousand years. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide. When living organisms originated, they modified the early atmosphere of the Earth. Which of the statements given above is/are correct ?

Accepted Answer

C. 1 and 3 only

Question 2

Among the following organisms, which one does not belong to the class of other three?

Accepted Answer

A. Crab

Question 3

Which of the following phenomena might have influenced the evolution of organisms? Continental drift Glacial cycles Select the correct answer using the code given below.

Accepted Answer

C. Both 1 and 2

Question 4

Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

Accepted Answer

B. Carbon, Hydrogen, Nitrogen

Question 5

Among the following, which one is not an ape?

Accepted Answer

C. Langur

Question 6

Octopus is

Accepted Answer

D. a mollusc

Question 7

Consider the following statements:

The common blue green algae, Spirogyra and Ulothrix, are found n both fresh water ponds and oceans.
The Chameleon can look ahead with one eye, and at the same time look behind with another.

Which of these statements is/are correct?

Accepted Answer

B. Only 2

Question 8

In the context of organic evolution the loss of limbs in snakes is explained by the phenomenon of

Accepted Answer

A. use and disuse of organs

Question 9

Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

Accepted Answer

B. Mutation

Question 10

The tribal population in Andaman and Nicobar Islands belongs to the:

Accepted Answer

D. Negroid race