Home
Class 11
BIOLOGY
Following are the two statements regardi...

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

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • PLANT KINGDOM

    SARAS PUBLICATION|Exercise EXAMPLE|161 Videos
  • REPRODUCTIVE MORPHOLOGY

    SARAS PUBLICATION|Exercise EXAMPLE|288 Videos

Similar Questions

Explore conceptually related problems

Which of the following statements is not correct regarding sexuality in organisms ?

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?

Consider the following statements each with one or two balnks. (i) The bile duct and the pancreatic duct open together into the duodenum as the (1) which is guarded by a sphincter called the (2) (ii) (3) is a proteolytic enzyme found in gastric juice of infants which hleps in the digestion of milk proteins. (iii) Fatty acids and glycerol being insoluble, cannot be absorbed into the blood. They are first incorporated into small droplets called (4) which move into the intestinal mucose. They are re-formed into very small protein coated fat globules called the (5) which are transported into the lymph vessels (lacteals ) in the villi. Which of the folllowing options gives the correct fill ups for the respective blanks in the above statements?

Consider the following statements each with one or two blanks. (i) Repeated activation of the muscle can lead to the accumulation of (A) due to anaerobic breakdown of glycogen in them, causing fatigue. (ii) The globular head of meromyosin is an active ATPase enzyme and has binding sites for (B) active sites for (C) . This centre part of thick filament, not overlapped by thin filaments is called the (D) . Which one of the following options correctly fils the concerned blanks ?

Read the following statements regarding the various techniques used in cancer detection. (i) Cancer detection is based on biopsy and histopathological studies of the tissue, and blood and bone marrow tests for increased cell counts in case of leukaemia. (ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by a pathologist. (iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI(magnetic resonance imaging) are very useful to detect cancers of the internal organs. (iv) Computed tomography uses strong magnetic fileds and non-ionising radiations to detect physiological changes in living tissues. (v) MRI uses X-rays and ionising radiation to generate a 3-D image of the internal structure of an object. Which of the above statements are incorrect ?

SARAS PUBLICATION-PLANT PHYSIOLOGY-EXAMPLE
  1. Which one of the following statements is wrong?

    Text Solution

    |

  2. In a chloroplast the highest number of protons are found in:

    Text Solution

    |

  3. In which of the following, all three are macronutrients?

    Text Solution

    |

  4. Following are the two statements regarding the origin of life:The earl...

    Text Solution

    |

  5. Depletion of which gas in the atmosphere can lead to an increased inci...

    Text Solution

    |

  6. A true breeding plant is:

    Text Solution

    |

  7. The label of a herbarium sheet does not carry information on:

    Text Solution

    |

  8. The balloon - shaped structures called tyloses?-

    Text Solution

    |

  9. Which of the following biomolecules is common to breakdown of fats , c...

    Text Solution

    |

  10. The process which makes major difference between C3 and C4 plant is :

    Text Solution

    |

  11. Match column I with column II and select the correct option using the ...

    Text Solution

    |

  12. Oxidative phosphorylation is:

    Text Solution

    |

  13. Which of the following describes the given graph correctly ? .

    Text Solution

    |

  14. Name the ion responsible for unmasking of active sites for cross-bridg...

    Text Solution

    |

  15. Lungs do not collapse between breaths and some air always remains in ...

    Text Solution

    |

  16. Which one of the Following statements is correct, with reference to ...

    Text Solution

    |

  17. A symptote is a logistic growthcurve is obtained when:

    Text Solution

    |

  18. Which of the following facilitates opening of stomatal aperture?

    Text Solution

    |

  19. Which statement is wrong for Krebs cycle ?

    Text Solution

    |

  20. Phosphoenol pyruvate (PEP) is the primary CO(2) acceptor in

    Text Solution

    |