Home
Class 12
BIOLOGY
On investigation, the following data was...

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?

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND POPULATIONS

    ICSE|Exercise PREVIOUS YEARS. BOARD PAPER QUESTIONS (VERY SHORT ANSWER TYPE QUESTIONS)|5 Videos

  • ORGANISMS AND POPULATIONS

    ICSE|Exercise PREVIOUS YEARS. BOARD PAPER QUESTIONS (SHORT ANSWER TYPE-I QUESTIONS)|1 Videos

  • ORGANISMS AND POPULATIONS

    ICSE|Exercise PRACTICE QUESTIONS ( SHORT ANSWER TYPE -II QUESTIONS)|18 Videos

  • MOLECULAR BASIS OF INHERITANCE

    ICSE|Exercise MCQ (Source Based Questions)|23 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATION

    ICSE|Exercise MULTIPLE CHOICE QUESTION|98 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 :

A population grows at the rate of 5% per year. Then the population will be doubled in :

In a population of an area, the difference in the natality rate and mortality rate is zero in a particular year, but the population density has decreased. Which of the following may be the reason for this decrease ?

In desert ecosystem in India rain fall per year is

Calculate the compound interest for the second year on rupes 12,000 invested for 3 year at 10 % per year. Also find the sum due at the end of the third year.

The population of a city increased by 10% in the previous year. If the present population is 1,32,000, what was the population of the city a year ago?

If in a population, natality is balanced by mortality, then there will be

During the years 1986 through 1988, what was the average earning per year?