Home
Class 12
BIOLOGY
In a pond there were 200 frogs, 40 more ...

In a pond there were 200 frogs, 40 more were born in a year. Calculate the birth rate of the population.

Text Solution

Verified by Experts

Birth rate=`("No of individuals born")/("Total no. of individual")`
`40/200`= 0.5 Frog per year
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SECTION-C|95 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SECTION-D|50 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SECTION-A|48 Videos

  • SAMPLE PAPER 2019

    XII BOARDS PREVIOUS YEAR|Exercise Section E Part B|3 Videos

Similar Questions

Explore conceptually related problems

(a) In a pond there were 200 frogs , 40 more were born in the year . Calculate the birth rate of the population. (b) Population in terms of number is not always a necessary parameter to measure population density . Justify with two examples .

In a pond there were 20 Hydrilla plants. Through reproduction 10 new Hydrilla plants were added in a year. Calculate the birth rate of the population.

In a pound, last year there were 30 ltus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are _______and _____individulas per lotus per year.

The average age of a couple is 25 years. The average age of the family just after the birth of the first child was 18 years. The average age of the family just after the second child was born was 15 years. The average age of the family after the third and the fourth children (who are twins) were born was 12 years. If the present average age of the family of six persons is 16 years, how old is the eldest child ?

The population of a town increases at a rate proportional to the population at that time . If the population increases from 40 thousands to 60 thousands in 40 years, What will be the population in another 20 years ? = [ Given: sqrt(3/2) = 1.2247 ]

XII BOARDS PREVIOUS YEAR-XII BOARDS-SECTION-B
  1. When a tall pea plant was selfed, it produced one-fourth of its progen...

    Text Solution

    |

  2. Chlorofluorocarbons (CFCs) are widely used as refrigerants. Then why i...

    Text Solution

    |

  3. In a pond there were 200 frogs, 40 more were born in a year. Calculate...

    Text Solution

    |

  4. Where does triple fusion take place in a flowering plant? Why is it so...

    Text Solution

    |

  5. Why certain regions have been declared as biodiversity "hot spots" by ...

    Text Solution

    |

  6. How does an electrostatic precipitator work to remove particulate poll...

    Text Solution

    |

  7. Study the given aquatic food chain and answer the questions that follo...

    Text Solution

    |

  8. Why are F(2) phenotypic and genotypic ratios same in a cross between r...

    Text Solution

    |

  9. Geitonogamous flowering plants are genetically autogamous but function...

    Text Solution

    |

  10. When and where do chorionic villi appear in humans ? State their funct...

    Text Solution

    |

  11. In a cross between two tall pea plants some of the offsprings produced...

    Text Solution

    |

  12. A student on a school trip started sneezing and wheezing soon after r...

    Text Solution

    |

  13. Name two commonly used bioreactors. State the importance of using a bi...

    Text Solution

    |

  14. (a) How does cleistogamy ensure autogamy? (b) State one advantage an...

    Text Solution

    |

  15. A mature, embryo-sac in a flowering plant may possess 7-cells, but 8-n...

    Text Solution

    |

  16. Describe the structure of a nucleosome.

    Text Solution

    |

  17. Mention the evolutionary significance of the following organisms : (...

    Text Solution

    |

  18. In an agricultural field there is a prevalance of the following organi...

    Text Solution

    |

  19. How does the applications of the fungal genus, Glomus, to the agricult...

    Text Solution

    |

  20. Plenty of algal bloom is observed in a pond in your locality. a) Wri...

    Text Solution

    |