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12th Biology chapter 7 Bihar board with NCERT-Details & Highlights
| name of content | 12th Biology chapter 7 full solution |
| content | Biology objective type MCQ question with answer |
| name of subjects | class 12 Biology |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Biology chapter 7 all objective solutions – download PDF
1 Whose genetic material is
-
- (A) T – M.V.
- (B) Bacteriophage
- (C) DNA in both.
- (D) none of these
Answer: (B) Bacteriophage
2. What does the ratio 1 : 2 : 1 represent in a cross?
-
- (A) Effectiveness
- (B) incomplete effectiveness
- (C) Engagement
- (D) none of these
Answer: (A) Effectiveness
3. Have Echidna
-
- (A) connecting link
- (B) residual organ
- (C) missing link
- (D) none of these
Answer: (A) connecting link
4. Promoter of natural choice
-
- (A) Lamarck
- (B) Darwin
- (C) Fisher
- (D) Morgan
Answer: (B) Darwin
5. Genetic exception changes the gene intensity of which of the following?
-
- (A) first generation
- (B) next generation
- (C) recessive gene
- (D) dominant gene
Answer: (B) Next generation
6. ‘convergent evolution’ appears
-
- (A) by homologous organs
- (B) by analogous organs
- (C) by residual organs
- (D) all of the above
Answer: (B) By analogous organs
7. Which of the following does not show evidence of bio-evolution?
-
- (A) Archeopteryx
- (B) Cow
- (C) Peripetes
- (D) Neopilina
Answer: (B) Cow
8. Those organs which are different in origin but similar in terms of function are called
-
- (A) Equilateral limbs
- (B) Homologous
- (C) residual
- (D) none of these
Answer: (A) Equilateral limbs
9. The right lung of the snake is a part.
-
- (A) absorbent
- (B) Equivalence
- (C) brain
- (D) none of these
Answer: (A) Absorbent
10. Birds and insects have wings
-
- (A) Homogeneous organs
- (B) Asymmetric organs
- (C) Absorbent organs
- (D) Absorbent creatures
Ans: (B) Asymmetric organs
Bihar Board most mcq solution 12th biology chapter 7
11. The absorbing organ of man is
-
- (A) muscles of external ear
- (B) nictitating membrane
- (C) endometrium
- (D) all of them
Answer: (D) All of them
12. The oldest ancestor of the horse is
-
- (A) Eohippus
- (B) Mezohippus
- (C) Ikkus
- (D) Pleiahippus
Answer: (A) Eohippus
13. Found only in Africa
-
- (A) Giriff
- (B) Equivalence
- (C) Gorilla
- (D) all of them
Answer: (D) All of these
14. Which of the following is a lung-fish, which is found in West Africa?
-
- (A) Lepidosis
- (B) Equivalence
- (C) Protopterus
- (D) all of them
Answer: (C) Protopterus
15. The evolutionary history of an organism is called
-
- (A) ontogeny
- (B) Phylogeny
- (C) Ancestry
- (D) Paleontology
Answer: (B) Phylogeny
16. Important evidence of organic development is found in the following
-
- (A) homologous and residual organs
- (B) homologous organ
- (C) homologous and homologous organs
- (D) homologous and residual organs
Answer: (D) Homologous and recessive organs
17. Which of the following is a connecting link?
-
- (A) Echidna
- (B) Peripetus
- (C) Protopterus
- (D) all of the above
Answer: (D) All of the above
18. Respiratory organs found in humans are
-
- (A) ear muscles
- (B) abdominal muscles
- (C) muscles of the skull
- (D) all of the above
Answer: (B) Abdominal muscles
19. Which one of the following elements was not present in the atomic state in the primordial atmosphere of the Earth?
-
- (A) Carbon
- (B) Oxygen
- (C) Hydrogen
- (D) Nitrogen
Answer: (B) Oxygen
20. Hardywein’s law of squares explains
-
- (A) Chromosomal aberrations
- (B) genetic decomposition
- (C) of genetic equilibrium
- (D) all of the above
Ans: (C) of genetic equilibrium
21. High energy molecule is
-
- ( A ) TMV
- (B) ATP
- (C) DNA
- (D) RNA
Answer: (B) ATP
BSEB 12th biology chaptyer 7 objective solution
22. An important evidence found in support of organic evolution is found in
-
- (A) Congenital and remnant organs
- (B) equanimity and residual limbs
- (C) Only organs in society
- (D) Homologous and similar organs
Ans: (A) Congenital and remnant organs
23. Which one of the following is not a living fossil?
-
- (A) Nrip Kekada (Raj Karkat)
- (B) Sphenodon
- (C) Archeopteryx
- (D) Peripetus
Ans: (C) Archeopteryx
24. By whom were coservats experimentally bred?
-
- (A) Oparin
- (B) Fisher
- (C) Jacob and Monod
- (D) Urey and Miller
Answer: (A) Oparin
25. Which of the following theory considers evolution to be the cause of change in gene frequency?
-
- (A) Neo-Lamarckism
- (B) Neo-Darwinism
- (C) Synthesis theory
- (D) Darwinism
Answer: (B) Neo-Darwinism
26. The idea of survival of the fittest is presented by
-
- (A) Lamarck
- (B) Darwin
- (C) Weisman
- (D) Herbert
Answer: (B) Darwin
27. What is the vermiform appendix in us?
-
- (A) Essential organs
- (B) residual organ
- (C) Asymmetric organs
- (D) none of these
Ans: (B) Residual organ
28. Was present in the former atmosphere
-
- (A) Methane
- (B) Hydrogen in water
- (C) Ammonia
- (D) all of the above
Answer: (D) All of the above
29. The book related to the origin of life on earth was written by
-
- (A) By Operin
- (B) By Helden
- (C) By Darwin
- (D) all of the above
Answer: (A) By Operin
30. Archeopteryx is a connecting link between which of these two different types of animals?
-
- (A) water and land
- (B) Land and Mountains
- (C) land and air
- (D) none of these
Answer: (C) Land and Air
31. Darwin’s book ‘Origin of New Species with Natural Selection’ was published in
-
- (A) in 1809
- (B) in 1859
- (C) in 1857
- (D) in 1869
Answer: (B) in 1859
32. According to one of the most accepted theory, if the atmosphere contained the following gas other than H , 0 , H 2 , NH
-
- ( A ) CH
- ( B ) O ,
- ( C ) N ,
- (D) none of these
Answer: (A) CH
33. Abioticism is
-
- (A) Origin of life from non-living organisms
- (B) Origin of life from living things
- (C) Origin from virus and micro-organisms
- (D) spontaneous generation
Answer: (A) Origin of life from non-living organisms
34. The percentage ratio of cop, CH 2, CFC and NO in global warming is
-
- (A) 60%, 20%, 14%, and 6%
- (B) 60%, 20%, 14% and 60%
- (C) 20%, 14%, 60% and 6%
- (D) 20%, 14%, 6% and 60%
Answer: (A) 60%, 20%, 14%, and 6%
Important most mcq solution 12th biology chapter 7
35. The phenomenon of Industrial Millennism shows
-
- (A) Genetic Separation
- (B) Genetic segregation
- (C) Natural Selection
- (D) Geographical distribution
Answer: (C) Natural Selection
36. For the proof of the origin of life, Miller and Urey . did experiments, they used gases
NH3, H, and
-
- (A) N2 and 1,0
- (B) HO and CH,
- ( C ) CH , and Na
- (D) CO2 and NH3
Answer: (B) HO and CH,
37. On which ship did Darwin travel?
-
- (A) H.N.S.Eagle
- (B) H – M – S • Wiggle
- (C) Titanic
- ( D ) D Matrica
Answer: (B) H – M – S • Wiggle
38. In which period life was absent?
-
- (A) Archeozoic
- (B) Poliozoic
- (C) Proterozoic
- (D) Ezoic
Answer: (C) Proterozoic
39. From which fossil is the first evidence of the burial of the dead and the evidence of religion?
-
- (A) Neanderthal
- (B) Cro-Magnon
- (C) Hemo erectus
- (D) Homohevilus
Answer: (A) Neanderthals
40. In which of the following groups only homologous organs are included?
-
- (A) Whale’s paddle, Horse’s forelimbs, Man’s hand
- (B) Wings of butterfly, crow and insect
- (C) Forelimbs of a horse, Wings of an insect, Hand of man
- (D) wormlike appendage, body hair and patella
Answer: (A) Whale’s paddle, Horse’s forelimbs, Man’s hand
41. Who wrote the book ‘Philosophic Zoologic’?
-
- (A) Lamarck
- (B) Mendel
- (C) Darwin
- ( D ) Hugo – deries
Answer: (A) Lamarck
42. Which one of the following phenomena supports Darwin’s concept of natural selection in biological evolution?
-
- (A) Development of parasitic animals
- (B) production of dolly sheep by cloning
- (C) To develop insecticide resistance in insects
- (D) Organ development from stem cells to organ transfer
Answer: (C) To develop insecticide resistance in insects
43. Heckel’s veogenetic law is
-
- (A) Omnis Vaivam – A – Vaivam
- (B) Amnis Cellula – A – Cellula
- (C) Ontogeny reports phylogeny
- (D) Phylogeny Repeats ontogeny
Answer: (C) Ontogeny reports phylogeny
44. What evidences prove that humans are closer to chimpanzees than to langurs?
-
- (A) DNA from sex chromosomes
- (B) the morphology of the chromosome
- (C) from fossil remains
- (D) DNA from autosomes and heterosomes
Answer: (D) DNA of autosomes and heterosomes
45. Dinosaurs were present during?
-
- (A) Paleozoic
- (B) Precambrian
- (C) Cenozoic
- (D) Mesozoic
Answer: (D) Mesozoic
46. The theory of chemical origin of life has been told by whom?
-
- (A) Miller and Fox
- (B) Oparin and Haldane
- (C) Miller and Watson
- (D) Watson and Melvin
Answer: (B) Oparin and Haldane
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Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |