Home
Class 12
BIOLOGY
[A] : Lichens are composite organisms . ...

[A] : Lichens are composite organisms .
[R] : The fungal component in Basidiolichens belong to Basidiomycetes and algal component of association is either a green alga or myxophycean member .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • EVOLUTION

    TRUEMEN BIOLOGY ENGLISH|Exercise MULTIPLE CHOICE QUESTIONS|334 Videos

  • Genetics

    TRUEMEN BIOLOGY ENGLISH|Exercise ASSERTION AND REASON|122 Videos

Similar Questions

Explore conceptually related problems

Lichens are symbiotic associations of an algal and fungal component . Respectively, they are termed as

In lichens, the algal component is known as (A)____ and the fungal component as (B)_____

Read the following statements carefully and identify correct statements w.r.t. Lichens a. The association cannot tolerate air pollution, especially due to sulphur dioxide b. Lichens are annuals and their growth is slow c. The fungal partner mostly belongs to ascomycetes. d. Soredia are most efficient means of asexual reproduction e. Orchids seldom occur without this association f. Foliose lichens are pioneers of succession in a water body.

A : Phycobiont is dominant parent in lichens. R : Algal component in the dual organisms can be eukaryotic only.

Read the given statements about lichens and select the incorrect ones. (i) They represent an example of commensallism. (ii) Algal partner obtains water and mineral salts from the fungus and the fungal partner obtains food prepared by the aiga. (iii) These do not grow in polluted areas. (iv) The mycobiont is usually an Ascomycetes or a Basididiomycetes. (v) The phycobiont is mostly a green alga or a cyanobacterium. (vi) These constitute the pioneer community in case of hydrosere.

Lichens are small group of curious plants, whose body is made up of an algal and a fungal components, both of which live together in an intimate relationship. Both algal and fungal partners are benefited by the association. What will happen if algal and fungal partners are separated from each other?

A : Azotodesmic lichens are biofertilisers enriching nitrogen contents in soil. R : This ability is due to the presence of heterocystous blue-green algae as phycobiont component.

Lichen is usually cited as an example of 'symbiosis' in plants where an algal and a fungal species live together for their mutual benefit. Which of the following will happen if algal and fungal partners are separated form each other (a) Both will survive and grow normally and independent from each other. (b) Both will die (c) Algal component will survive while the fungal component will die. (d) Fungal component will survive while algal patern will die.

TRUEMEN BIOLOGY ENGLISH-Fungi -ASSERTION AND REASON
  1. [A] : The obligate parasites can live only on dead hosts . [R] : The...

    Text Solution

    |

  2. [A] : Disease reduce the vitality of plants , inhibit their developmen...

    Text Solution

    |

  3. [A] : Lichens are composite organisms . [R] : The fungal component i...

    Text Solution

    |

  4. [A] : Candida is a false yeast . [R] : It lacks ascus formation .

    Text Solution

    |

  5. [A] : Heterotrophs may be free living or symbiotic . [R] : They form...

    Text Solution

    |

  6. [A] : Rusts and smuts are club fungi that parasitize cereal crops . ...

    Text Solution

    |

  7. Assertion : The fungi are widespread in distribution and they even liv...

    Text Solution

    |

  8. [A] : Symbiosis is also furnished by mycorrhiza . [R] : In Mycorrhiz...

    Text Solution

    |

  9. [A] : Phytoalexins are formed as a result of mixing of auxins and gi...

    Text Solution

    |

  10. [A] : Zygospore fungi produce spores within sporangia . [R] : During...

    Text Solution

    |

  11. [A] : Club fungi reproduce sexually . [R] : In club fungi , dikaryot...

    Text Solution

    |

  12. [A] : The sterile portion of sporangium in Mucor is called columella ....

    Text Solution

    |

  13. [A] : Fungi are thallophyta . [R] : Cell wall of fungi is made up of...

    Text Solution

    |

  14. [A] : Fungi are either saprobes or parasitic . [R] : Fungi posses ha...

    Text Solution

    |

  15. [A] : Aspergillus is used as bioindicator . [R] : Aspergillus niger ...

    Text Solution

    |

  16. [A] : Rhizopus contains two types of hyphae . [R] : The unbranched h...

    Text Solution

    |

  17. [A] : Puccinia graminis is autoecious . [R] : It complete its life c...

    Text Solution

    |

  18. [A] : Schizosaccharomyces is also called the fission yeast . [R] : S...

    Text Solution

    |

  19. [A] : Ascomycetes and basidiomycetes are septate fungi . [R] : The h...

    Text Solution

    |

  20. [A] : Myxomycetes are not true fungi . [R] : Myxomycetes possess cha...

    Text Solution

    |