Home
Class 12
BIOLOGY
[A]: In some organisms the end stages of...

[A]: In some organisms the end stages of the ancestral development pattern are dropped, as in case of neoteny.
[R]: In some animals, some middle stages are dropped in the descendents

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

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • Fungi

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|27 Videos

  • GENETICS AND EVOLUTION

    TRUEMAN BIOLOGY|Exercise SECTION-A|34 Videos

Similar Questions

Explore conceptually related problems

Spherical marbles of diameter 1.4 cm are dropped into a cylindrical beaker of diameter 7 cm,which contains some water. Find the number marbles that should be dropped in to the beaker , so that water level rises by 5.6 cm.

[A]: Pollen grains from male parent are mostly transferred to the stigma in the female parent by some external ageincy. [R]: This is because the male flowers or male organs have no intemal device to reach the female organs in another flower

A drop of some liquid of volume 0.04 cm^3 is placed on the surface of a glass slide. Then another glass slide is placed on it in such a way that the liquid forms a thin layer of area 20 cm^2 between the surfaces of the two slides. To separate the slides a force of 16 xx 10^5 dyne has to be applied normal to the surfaces. The surface tension of the liquid is (in dyne- cm^(-1) )

Stage in some fungi having two haploid nuclei per cell is

In some animal groups, the body is found divided into compartments with at least some organs/organ repeated. This characteristic feature is named

[A] : The obligate parasites can live only on dead hosts . [R] : There are some organisms which grow and live together but each one is always harmed by the other . This phenomenon is known as antagonism .

The water equivalent of a calorimeter is 10g and it contains 50 g of water at 15^(@)C . Some amount of ice, initially at -10^(@)C is dropped in it and half of the ice melts till equilibrium is reached. What was the initial amount of ice that was dropped (when specific heat of ice =0.5"cal"gm^(-1)""^(@)C^(-1) specific heat of water =1.0"cal"gm^(-1)""^(@)C^(-1) and laten heat of melting of ice =80"cal"gm^(-1) )?

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Convergent evolution leads to production of analogous similaritie...

    Text Solution

    |

  2. [A]: Heritable changes are also called muta- tions. [R]: Mutation...

    Text Solution

    |

  3. [A]: In some organisms the end stages of the ancestral development pat...

    Text Solution

    |

  4. [A]: Homologous organs have similar structure but different functions....

    Text Solution

    |

  5. [A]: In large groups of animals and plants, there are identical enzyme...

    Text Solution

    |

  6. [A]: During evolution of Primates, various groups diverged in a partic...

    Text Solution

    |

  7. [A]: Macro evolution produces groups of parallel special adaptations a...

    Text Solution

    |

  8. [A] : Organisms that bear large number of common amino acid sequence m...

    Text Solution

    |

  9. [A]: Homologous organs are similar in basic structure and embryonic or...

    Text Solution

    |

  10. Assertion:Analogous organs serve the same function and look alike, but...

    Text Solution

    |

  11. Assertion:Frog's tadpole has fish-like form, tail and gills Reason: ...

    Text Solution

    |

  12. Assertion:Jurassic period is considered as the age of reptiles. Reas...

    Text Solution

    |

  13. [A]: Some babies have a small tail. [R]: This is just a freak of ...

    Text Solution

    |

  14. [A]: The first life originated was chemoheterotrophic. [R]: The f...

    Text Solution

    |

  15. [A]: Evolution is a theory. [R]: As it is based on causes and evi...

    Text Solution

    |

  16. [A]: Cabbage, cauliflower, Kohlrabi, Broccoli and Brussels have descen...

    Text Solution

    |

  17. [A]: Evolution is not occurring at present. [R]: Evolution is a v...

    Text Solution

    |

  18. [A]: According to the theory of Lamarck use and disuse caused the incr...

    Text Solution

    |

  19. [A]: Fossils of Peking man were discovered from caves near Peking in 1...

    Text Solution

    |

  20. [A]: Man's most characteristic feature in which it differs from all it...

    Text Solution

    |