Question

Calculate the birth rate if a population of 150 Paramoecium present in a pool increases to 450 after an hour.

Options

• 0.1

• 0.05

• 0.01

• 0.5

Answer 1

0.5

Exlanation:

Paramoecium population at the start = 150 After 1 hour, the population of Paramoecium is 300. The number of fresh Paramoecium is 450 minus 150, which equals 300.

Birth rate

= initial Paramoecium population/number of new Paramoecium

= 150/300

= 0.5