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

A biologist studied 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 increases 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)|33 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    AAKASH SERIES|Exercise Exercise - III|27 Videos

Similar Questions

Explore conceptually related problems

A biologist studied 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 populations is :

A biologist studied 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 populations is :

On investigation, the following data was obtained regarding population of rats in a barn: Average natality =500 per year, Average mortality = 480 per year, Immigration = 25 per year, Emigration = 45 per year Indicate whether the population is increasing or decreasing? If at the start of investigation there were 100 rats, how many would there be at the end of ten years?

The given figure represents different factors affecting population density (N) . If B = natality D = mortality , E = emigration and I = immigration, then select the incorrect option regarding these.

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 studied 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 most by

    Text Solution

    |

  7. Cuscuta is an example of a

    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 (i-iv) and select the correct p...

    Text Solution

    |

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

    Text Solution

    |

  12. The logiostic 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

    |