Home
Class 12
BIOLOGY
Following are the two statements regardi...

Following are the two statements regarding the origin of life.
I. The earliest orgaisms that appeared on the earth were non-green and presumably anaerobs.
II. The first autophic orgainsms were the chemoautrophs that never realased oxygen.
Of the above stateements which of the following option is correct ?

A

Both a and b are false

B

a is correct but b is false

C

b is correct but a is false

D

Both a and b are correct

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND THE ENVIRONMENT

    DINESH PUBLICATION ENGLISH|Exercise CYG|17 Videos

  • PHOTOSYNTHESIS

    DINESH PUBLICATION ENGLISH|Exercise CYG|10 Videos

Similar Questions

Explore conceptually related problems

Following are the two statements regarding the origin of life I. The earliest organisms that appeared on the earth were nongreen and presumably anaerobes. II. The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct?

Following are the two statements regarding the origin of life : A. " " The earliest organisms that appeared on the earth were non-green and presumably anaerobes. B. " " The first autotrophic organisms were the chemoautotrophs that never relesed oxygen. Of the above statements which one of the following options is correct ?

Following are the statements regarding the origin of life (A) The earliest organisms that appeared on the earth were non-green and presumably anaerobes (B) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct

Following are the two statements regarding the origin of life (a) the earliest organisms that appeared on the earth were nongreen and presumably anaerobic The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of following options is correct

Following are the two statements regarding the origin of life (a) the earliest organisms that appeared on the earth were nongreen and presumably anaerobic The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of following options is correct

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes. Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

The following are the two statements regarding carbon dioxide: (a) Carbon dioxide produced during cellular respiration must be eliminated from the body. (b) Carbon dioxide reacts with water to form carbonic acid and thus increases pH. Of the above statements, which one of the following options is correct

The following are the two statements regarding prostate gland in man: (a) The secretion of prostate glands is slightly acidic. (b) Seminal plasma contains citric acid. Of the above statements, which one of the following options is correct?

The following are the two statements regarding alveolar fluid: (a) It contains a surfactant that reduces the tendency of alveoli to collapse. (b) Surfactant in the alveolar fluid lowers the surface tension. Of the above statements, which one of the following options is correct?

Study the following statements regarding the anatomy of isobilateral leaf. (i) Stomata are equally distributed on both the surfaces (ii) certain adaxial epidermal cells are modified into bulliform cells in grasses. (iii). The vasuclar bundles are radial (iv). Phloem is adaxially placed. Which of the above statements are correct?

DINESH PUBLICATION ENGLISH-ORIGIN OF LIFE -All Questions
  1. Ionosphere is between

    Text Solution

    |

  2. Oparin and Haldane proposed:

    Text Solution

    |

  3. In miller's experiment the following was not part of the starting chem...

    Text Solution

    |

  4. Which was the first catalytic molecule during evolution of life?

    Text Solution

    |

  5. Who gave the theory which is known as primary abiogenesis

    Text Solution

    |

  6. The most common chemical compounds formed in Urey-Miller's experiment ...

    Text Solution

    |

  7. Following are the two statements regarding the origin of life. I. T...

    Text Solution

    |

  8. Which of the following is the correct sequence of events in the origin...

    Text Solution

    |

  9. Big bang theory was proposed by

    Text Solution

    |

  10. Our galaxy is

    Text Solution

    |

  11. Coacervates were formed by (a) Radiations (b) Polymerisation (c) ...

    Text Solution

    |

  12. What is the name fo theory which states that life develops from life?

    Text Solution

    |

  13. Origin of Life (a) Special creation (b) Spontaneous generation (c)...

    Text Solution

    |

  14. Spallanzani kept boiled nutrition broth indefinitely in

    Text Solution

    |

  15. The term protobiogenesis is used for theory of

    Text Solution

    |

  16. In early earth oxygen

    Text Solution

    |

  17. Non-amino organic acids produced in Miller's experiment were (a) Lacti...

    Text Solution

    |

  18. Fox heated a mixture of amino acids and got (a) Purines and pyrimidin...

    Text Solution

    |

  19. Nucleotides, porphyrins, polypeptides and other biochemicals developed...

    Text Solution

    |

  20. The first eukaryotes to evolve were

    Text Solution

    |