MCQ OF OUR ENVIRONMENT & ORIGIN AND EVOLUTION OF LIFE CLASS: X

OUR ENVIRONMENT & ORIGIN AND EVOLUTION OF LIFE

CLASS: X

1. Ecosystem term was coined by
(A) Odum (B) Mishra (C) Reiter (D) Tansley

2. Pyramids of biomass are
(A) upright or inverted (B) always inverted (C) mostly upright (D) mostly inverted

3. Vultures in an ecosystem are
(A) predators (B) scavengers (C) consumers (D) top carnivores

4. In which of the following trophic levels in any ecosystem the maximum energy is stored ?
(A) Producers (B) Herbivores (C) Carnivores (D) Top carnivores (E) None of these

5. In an ecosystem the
(A) primary producers are more than that of primary consumers
(B) secondary consumers are largest, because they are powerful
(C) primary consumers are out of number
(D) primary consumers are least dependent upon primary producers

6. In an ecosystem the function of the produces is to
(A) convert organic compounds into inorganic compounds (B) trap solar energy and convert in into chemical energy
(C) utilize chemical energy (D) release energy (E) none of these

7. The importance of ecosystem lies in
(A) flow of energy (B) cycling of materials (C) both of the above (D) none of the above

8. A biosphere is composed of
(A) living organisms
(B) living organisms and lithosphere
(C) living organisms, lithosphere and atmosphere
(D) living organisms, lithosphere, atmosphere and hydrosphere

9. Pyramid of energy in a forest ecosystem is
(A) always inverted (B) always upright
(C) both upright and inverted (D) first upright then inverted

10. Which one of these is likely to have been absent in free form at the time of origin of life ?
(A) Oxygen (B) Hydrogen (C) Ammonia (D) Methane

11. Which of the following is not a vestigial organ in man ?
(A) Vermiform appendix (B) Plica seminualris (C) Ear muscles (D) Epiglottis

 12. The famous book “Origin of Species” was written by Charles Darwin in
(A) 1809 (B) 1859 (C) 1885 (D) 1871
13. Charles Darwin toured in a ship for five years it was
(A) Vikrant (B) Phillips (C) Alexander (D) Beagle

14. The term evolution in Biology means that
(A) fossils are old (B) life began in Sea
(C) living things constantly change (D) none of the above

15. The theory of Natural selection of Darwin to explain organic evolution was based on
(A) modification in organs through used and disuse
(B) probability of reproduction, struggle for existence and survival of the fittest
(C) Inheritance of acquired characters
(D) appearance of sudden large variations, then inheritance and survival of those having these variations

16. Homologus structures have
(A) similar origin & dissimilar function (B) dissimilar origin but similar function
(C) structurally as well as functionally similar (D) normally non-functional

17. Analogous organs are those which are
(A) structurally similar (B) functionally similar
(C) structurally as well as functionally similar (D) normally non-functional

18. The concept or idea of “Survival of fittest” was given by
(A) Darwin (B) Herbert Spencer (C) Lamarck (D) Devries

19. Evolution is the best defined by
(A) inheritance of acquired characters (B) struggle for existence
(C) spontaneous generation (D) none of these

20  Which one is not a vestigial organ in man ?
(A) Vermiform appendix (B) Plica seminualris (C) Ear muscles (D) Epiglottis

21. Which one of these is likely to have been absent in free form at the time of origin of life ?
(A) Oxygen (B) Hydrogen (C) Ammonia (D) Methane

22. The famous book “Origin of Species” was written by Charles Darwin in
(A) 1809 (B) 1859 (C) 1885 (D) 1871

23. Charles Darwin toured in a ship for five years it was
(A) Vikrant (B) Phillips (C) Alexander (D) Beagle

24. The term evolution in Biology means that
(A) fossils are old (B) life began in Sea
(C) living things constantly change (D) none of the above

25. The theory of Natural selection of Darwin to explain organic evolution was based on
(A) modification in organs through used and disuse
(B) probability of reproduction, struggle for existence and survival of the fittest
(C) Inheritance of acquired characters
(D) appearance of sudden large variations, then inheritance and survival of those having these variations

26. Homologus structures have
(A) similar origin & dissimilar function (B) dissimilar origin but similar function
(C) structurally as well as functionally similar (D) normally non-functional

27. Analogous organs are those which are
(A) structurally similar (B) functionally similar
(C) structurally as well as functionally similar (D) normally non-functional

28. The idea of “Survival of fittest” was given by
(A) Darwin (B) Herbert Spencer (C) Lamarck (D) Devries

29. Evolution is the best defined by
(A) inheritance of acquired characters (B)  struggle for existence
(C) spontaneous generation (D).descent by modifications

BY ARANBIR SINGH