Home
Class 11
BIOLOGY
Assertion. Many female insects emit phe...

Assertion. Many female insects emit pheromones into the air.
Reason. Pheromones help the downwind malesto locate the females far away from them.

A

If both A and B 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 but R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ANIMAL KINGDOM

    PRADEEP|Exercise PRACTICE QUESTIONS (I.) MULTIPLE CHOICE QUESTIONS|240 Videos

  • ANATOMY OF FLOWERING PLANTS

    PRADEEP|Exercise ASSERTION-REASON TYPE QUESTIONS|14 Videos

  • BIOLOGICAL CLASSIFICATION

    PRADEEP|Exercise Practice Questions (II. Assertion-Reason Type Questions)|8 Videos

Similar Questions

Explore conceptually related problems

Assertion: CO_(2) and water vapour present in the atmosphere absorb the re-emitted IR radiations from the earth's surface and warm the air. Reason: For greenhouse effect, presence of green plants is essential.

Assertion : Concave lens is used to correct myopia or short-sightedness. Reason : A concave lens of suitable focal length diverges the parallel rays from the distant objects as if they are coming from the far point of the myopic eye. This helps the eye lens to form a clear image at the retina.

Assertion: If there is a system of two unequal point charges of any polarity then there is one and only one point in space around it where the electric field intensity is zero. Reason: The direction of electric field intensity at a point is away from the positive charge and towards the negative charge, along the line joining the charge and location where electric field intensity is to be calculated.

Assertion: Electric field intensity at a point due to a positive charge is always opposite in direction to electric field intensity due to negative charge, and it is independent to locațions of charges. Reason: The direction of electric field due to a point charge is away from the positive charge and towards the negative charge along the line joining the point charge and location where the electric field is to be calculated.

Gopi, Nithya, Shilpa, Renu, Gowtham, Priya, Prasanth and Sridhar are sitting around a square table in such a way that four of them sit at four corners of the square while four sit in the middle of each of the four sides. The ones who sit at the four corners face the center while those who sit in the middle of the sides face outside. Two females sit in the middle of the sides and two at the corners. Shilpa sits second to the left of Prasanth. Prasanth sits in the middle of one of the sides. Gopi sits fourth to the right of his wife and his wife is not an immediate neighbour of Shilpa or Prasanth. Nithya sits third to right of her husband. Nithya does not sit at any of the corners. Only Renu sits between Nithya and Sridhar. Sridhar is the husband of Shilpa. Gowtham is a male. How many people sit between Nithya and Gopi when counted in anti-clockwise direction from Nithya ?

Male Atlas Moth has huge antennae that can detect pheromone released by female moth from a distance of

Assertion (A): Lactation happens at the adolescent stage of a female. Reason (R): The secretion of diiferent hormones during the later stage of pregnancy helps in milk production.

Assertion (A) : Acid rains have been reported in some places which are far away from the placed where industries are located. Reason (R) : Rain clouds move from the idustrial areas to the other areas due to the below of wind

PRADEEP-ANIMAL KINGDOM -Assertion-Reason Type Questions
  1. Assertion. Oysters and clams produce pearls. Reason. They are cultur...

    Text Solution

    |

  2. Assertion. Sepia emits a dark cloud of ink when persued by an enemy. ...

    Text Solution

    |

  3. Assertion. Many female insects emit pheromones into the air. Reason...

    Text Solution

    |

  4. Assertion. Arthropods undergo periodic ecdysis during their growth. ...

    Text Solution

    |

  5. Assertion. Ambulacral system of echinoderms contains water. Pores in...

    Text Solution

    |

  6. Assertion.Annelids, mollusks and arthropods are protostomous coelomate...

    Text Solution

    |

  7. Assertion. Small Tiedmann's bodies are associated with the ring ambula...

    Text Solution

    |

  8. Assertion.Termites and ants are social insects. Reason. Both establi...

    Text Solution

    |

  9. Assertion: Tapeworm, roundworm and pinworm are endoparasites of human ...

    Text Solution

    |

  10. Read the given statements and select the correct option. Statement 1...

    Text Solution

    |

  11. Assertion. Urochordate's tadpole larva is more chordata-like than the ...

    Text Solution

    |

  12. Assertion. Petromyzon ascends the rivers to spawn. Reason. It destro...

    Text Solution

    |

  13. Assertion. A fish cannot survive out of water. Reason. It gets O(2) ...

    Text Solution

    |

  14. Assertion : A shark can stay at a desired level in water without swinn...

    Text Solution

    |

  15. Assertion. Many deep sea fishes are luminscent. Reason. They use lig...

    Text Solution

    |

  16. Read the give statements and select the correct option. Statement 1 ...

    Text Solution

    |

  17. Assertion. Poison of cobra is neurotoxic. Reason. Antivenine is the ...

    Text Solution

    |

  18. Assertion.Avianbones are pneumatic. Reason. This makes body light fo...

    Text Solution

    |

  19. Assertion. In birds, syrinx acts as a voice box. Reason. They lack ...

    Text Solution

    |

  20. Assertion. Birds and mammals are endothermic. Reason. They generate ...

    Text Solution

    |