Question

If a population of 50 Paramoecium present in a pool increases to 150
after an hour, what would be the growth rate of population?
a. 50 per hour
b. 200 per hour
c. 5 per hour
d. 100 per hour


NCERT Class XII
Biology - Main Course Book

Chapter 13. Organisms and Popolations

Answer 1

D.100 per hour as there were 50 and after 1 hour it was 150 so 150-50=100

Answer 2

Growth rate of population is 100 per hour.

Initial population of paramecium in pond =50

Final population of paramecium in pond =150

Increase in population of paramecium=(final-initial) population.

=(150-50)=100

Time in which population increase=1hour.

So increase in population of paramecium in one hour is 100 per hour .

●paramecium divide by binary fission so they double their number in one division.