Evolution MCQ Chapter 7 Class 10 Biology

Evolution MCQ/Objective Questions Chapter 7 Class 10 Biology

What do we call to the study of the history of life forms?

  • a. Genetics
  • b. Ecology
  • c. Evolutionary Biology
  • d. Ornithology
Answer
  • c. Evolutionary Biology

The early earth contained:

  • a. Methane, Carbon dioxide, ammonia, and water 
  • b. Oxygen, Carbon dioxide and water
  • c. Ammonia, and water
  • d. None
Answer
  • d. None

How did the early earth produce oxygen?

  • a. Breakdown of calcium carbonate in acidic condiction
  • b. Splitting of water in UV rays
  • c. Through respiration of archaebacteria
  • d. None
Answer
  • b. Splitting of water in UV rays

When did the earth form?

  • a. 20 billion year ago
  • b. 4.5 billion year ago
  • c. 4 billion year ago
  • d. None
Answer
  • b. 4.5 billion year ago
Explanation
Big bang happened 20 billion year ago. Gases from big bang condensed and forms galaxies and earth 4.5 billion year ago. Afther 500 million year of this life appeared.

Which therory says life on earth came from spores of another planet?

  • a. Primordial soup theory
  • b. Panspermia
  • c. Darwin’s thory 
  • d. None
Answer
  • b. Panspermia
Explanation
Primordial soup theory says life orginated from complex combination of  chemicals present in early earth under UV and high temperature.

Panspermia theory says life came from another planet through spores.

Darvin theory says how species evolved from one form to another.

In Miller’s experiment the raw material for genesis of life was:

  • a. Carbondioxide, hydrogen, ammonia
  • b. Oxygen, Methane
  • c. Methane, hydrogen, ammonia
  • d. Carbon dioxide, urea, water
Answer
  • c. Methane, hydrogen, ammonia
Explanation
In 1953, Miller did an experiment. he created early earth atmosphere with  methane, hydrogen gas and ammonia under high temperature of 800°C with electric sparks. After severaal day he found amino acids from the experiment.

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Evolution MCQ/Objective Questions Chapter 7 Class 10 Biology

Ref: ch7.

 

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