Evolution - Online Test
Q1. Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter
Answer : Option D
Explaination / Solution:
Simplest organisms could not have originated spontaneously from non-living matter. This can be shown as meat was not spoiled when heated and kept sealed in vessels.
Q2. The diagram represents Miller experiment. Choose the correct combination of labeling.
Answer : Option D
Explaination / Solution:
In Urey and Miller experiment the set up labeled as A – electrodes, B – (NH3 + H2 + H2O + CH4), C – cold water, D – Vacuum, E – U Trap.
Q3. What was the mixture of gases used in chamber marked A?
Answer : Option C
Explaination / Solution:
The gases used in Urey and Miller experiment in chamber marked A are Methane , ammonia , hydrogen , and water
Q4. Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
Reason: The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
Answer : Option D
Explaination / Solution:
Primitive earth was devoid of oxygen so, only those organisms that were able to survive within anaerobic conditions developed. All these were heterotrophic organisms (taking nutrients from outside). Then after autotrophic organisms were developed that used inorganic sources such as H2S,NH3,CH4 as the principle sources of energy. These oganisms are called chemo-autotrophs.
Q5. Assertion: Coacervates are believed to be the precursors of life.
Reason: Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.
Reason: Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.
Answer : Option C
Explaination / Solution:
Coacervates are believed to be the precursors of life. These molecules consists protein along with lipids. They are aggregates of proteins surrounded by lipid but self-duplicating ability were not present in them.
Q6. What was the resultant found in place marked E?
Answer : Option C
Explaination / Solution:
In Urey and Miller’s experiment the product formed after the continuous sparking in the mixture of gases at high temperature were some amino acids like glycine and alanine. Sugar and nitrogenous base were also obtained from same set up by some other scientist.
Q7. Big bang theory try to explain
Answer : Option A
Explaination / Solution:
The Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today.
It tries to explain the origin of universe. It told us about the singular large explosion unimaginable in physical term.
Q8. Some ancient organism still survive on earth but most of them have become extinct this is because of
Answer : Option C
Explaination / Solution:
Some ancient organism still survive on earth but most of them have become extinct this is because of presence of characteristic which enable them to survive better in natural conditions.
Q9. Assertion: Organic evolution explains that new species originated from pre-existing life forms and there is gradual variation in trait to adjust in particular habitats.
Reason: existing living forms share similarities to various degrees among themselves and also with life forms that existed millions of years ago.
Reason: existing living forms share similarities to various degrees among themselves and also with life forms that existed millions of years ago.
Answer : Option C
Explaination / Solution:
Organic evolution are the events involved in the evolutionary development of a species. It means that all life descended from other life, although features may have changed dramatically along the way.
Charles Robert Darwin collected the observations on animal distribution and the relationship between living and extinct animals. He found that existing living forms share similarities to varying degrees not only among themselves but also with the life forms that existed millions of years ago, some of which have become extinct.
Q10.
Which of the following statements are correct about origin of earth?
a. There was no atmosphere on early earth.
b. Water vapour, methane, carbon dioxide and ammonia are released from molten mass covered the earth.
c. Oxygen gas is released from plants during photosynthesis.
Answer : Option C
Explaination / Solution:
There was no atmosphere on early earth. Water vapour, methane, carbon dioxide and ammonia are released from molten mass covered the earth. Oxygen and hydrogen gas is formed by splitting of water by UV rays.
