Home
Class 12
BIOLOGY
A biologist studies the population of ra...

A biologist studies the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :

A

10

B

15

C

5

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND POPULATIONS

    AAKASH SERIES|Exercise EXERCISE-II (POPULATION INTERACTIONS)|1 Videos
  • NEURAL CONTROL AND COORDINATION

    AAKASH SERIES|Exercise EXERCISE-III( PREVIOUS AIPMT / NEET QUESTIONS)|34 Videos
  • PHOTOSYNTHESIS IN HIGHER PLANTS

    AAKASH SERIES|Exercise Exercise - III|27 Videos
AAKASH SERIES-ORGANISMS AND POPULATIONS-EXERCISE-III (PREVIOUS AIPMT/NEET QUESTIONS)
  1. Besides paddy fields, cyanobacteria are also found inside vegetative p...

    Text Solution

    |

  2. A sedentary sea anemone gets attached to the shell lining of hermit cr...

    Text Solution

    |

  3. A biologist studies the population of rats in a barn. He found that th...

    Text Solution

    |

  4. The age pyramid with broad base indicates

    Text Solution

    |

  5. Which of the following is not a parasitic adaptation?

    Text Solution

    |

  6. Benthic organisms are affected the most by

    Text Solution

    |

  7. Cuscuta is an example of

    Text Solution

    |

  8. What type of human population is represented by the following age pyra...

    Text Solution

    |

  9. Large woody vines are more commonly found in :

    Text Solution

    |

  10. Consider the following four conditions (a-d) and select the correct pa...

    Text Solution

    |

  11. Which one of the following is categorised as a parasite in true sense?

    Text Solution

    |

  12. The logistic popUlation growth is expressed by the equation

    Text Solution

    |

  13. The figure given below is a diagrammatic representation of response of...

    Text Solution

    |

  14. Which one of the following is one of the characteristics of a biologic...

    Text Solution

    |

  15. Which one of the following is most appropriately defined ?

    Text Solution

    |

  16. A country with a high rate of population growth took measures to reduc...

    Text Solution

    |

  17. Reduction in vascular tissue, mechanical tissue and cuticle is charact...

    Text Solution

    |

  18. Consider the following four statements (i)-(iv) about certain desert a...

    Text Solution

    |

  19. Quercus species are the dominant component in

    Text Solution

    |

  20. Geometric representation of age structure is a characteristic of :

    Text Solution

    |