Home
Class 12
BIOLOGY
Assertion: Heterocytes are specified cel...

Assertion: Heterocytes are specified cells of blue green algae for Nitrogen fixation.
Reason: In Heterocyst cells oxygen depleted conditions can be created, which is essential for Nitrogenase functioning

A

If both assertion and Reason are true and the reason is a correct explanation of the assertion.

B

If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion and Reason are False.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • DIVERSITY IN LIVING WORLD (PLANT DIVERSITY)

    ALLEN|Exercise EXERCISE -III|136 Videos
  • DIGESTION AND ABSORPTION

    ALLEN|Exercise S|28 Videos
  • DOMESTICATION OF PLANT (PLANT BREEDING)

    ALLEN|Exercise S|28 Videos

Similar Questions

Explore conceptually related problems

A specialized pale cell in blue green algae which is impermeable to oxygen is

Which of the following statements are true about heterocyst? 1. They are formed in blue - green algae. 2. Heterocysts are nitrogen - fixing cells. 3. Heterocyts are formed during nitrogen starvation . 4. Anabaena and Nostoc are examples of heterocyst forming bacteria.

Assertion: Blue green algae have chlorophyll 'a'. Reason: Photosynthesis with the help of Bateriochlorophyll releases oxygen.

Assertion : Nitrogenase enzyme gets inactivated in presence of oxygen yet N_(2) fixation occurs in aerobic cells of legume nodules. Reason : Laghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.

Assertion: Chlorella, a green alga, is commonly known as space alga. Reason: It is used by exobiologists for oxygen and disposal of nitrogen in prolonged space flight.

Assertion: Warm and moist environment can enhance the rate of decomposition Reason: Warm and moist climate leads to create anaerobic condition which promotes decomposition.

ALLEN-DIVERSITY IN LIVING WORLD (PLANT DIVERSITY)-Assertions and Reason
  1. Assertion: Although Bacterial structure is very simple yet they are ve...

    Text Solution

    |

  2. Assertion: Archaebacteria differ from other bacteria only in structure...

    Text Solution

    |

  3. Assertion: Heterocytes are specified cells of blue green algae for Nit...

    Text Solution

    |

  4. Asseration : Chemosynthetic autotrophic bacteria oxidise various inorg...

    Text Solution

    |

  5. Assertion: Members of protists are eukaryotes. Reason: Protistan cel...

    Text Solution

    |

  6. Assertion: The cellwall of diatoms is indestructible. Reason: The ce...

    Text Solution

    |

  7. Diatoms are the chief producers in the oceans, belong to group (a) chr...

    Text Solution

    |

  8. Assertion: Euglenoids can preform photosynthesis. Reason: They have ...

    Text Solution

    |

  9. Assertion: Slime moulds are protistan decomposers. Reason: Slime mou...

    Text Solution

    |

  10. Assertion: Fungi prefer to grow in cold and humid areas. Reason: Low...

    Text Solution

    |

  11. Assertion: In Ascomycetes and Basidiomycetes well distinct Dikaryophas...

    Text Solution

    |

  12. Assertion: Neurospora fungus is known as Drosophila of plant kingdom. ...

    Text Solution

    |

  13. Assertion: Archaebacteria are most resistant to adverse environmental ...

    Text Solution

    |

  14. Assertion: According to Whittaker's classification dinoflagellates are...

    Text Solution

    |

  15. Assertion: Phylogenetic classification system provides more accurate a...

    Text Solution

    |

  16. Assertion: In numerical taxonomy each character is given equal importa...

    Text Solution

    |

  17. Assertion: Algae are thalloid organisms of kingdom plantae. Reason:-...

    Text Solution

    |

  18. Assertion: Sexual reproduction of Spirogyra is isogamous type. Reaso...

    Text Solution

    |

  19. Assertion: Alage can bridge the gap between demand and supply of prote...

    Text Solution

    |

  20. Assertion: Bryophytes are not a successul land plants. Reason: In br...

    Text Solution

    |