Question : ------------------------refers to the number of birth during a given period in the population that are added to the initial density.

Option 1: Natality

Option 2: Mortality

Option 3: Immigration

Option 4: Emigration

Question : The birth rate measures the number of birth during a year per

Option 1: 100 population

Option 2: 1000 population

Option 3: 10000 population

Option 4: 100000 population

Question : The population of the city is 20,000. It increases by 20% during the first year and 30% during the second year. The population after two years will be:

Option 1: 32,000

Option 2: 40,000

Option 3: 31,200

Option 4: 30,000

Question : The number of eggs normally released during one menstrual cycle is :

Option 1: 3

Option 2: 2

Option 3: 1

Option 4: 4

Question : The value of $\left(2 \frac{6}{7}\right.$ of $\left.4 \frac{1}{5} \div \frac{2}{3}\right) \times 5 \frac{1}{9} \div\left(\frac{3}{4} \times 2 \frac{2}{3}\right.$ of $\left.\frac{1}{2} \div \frac{1}{4}\right)$ is:

Option 1: 25

Option 2: 19

Option 3: 23

Option 4: 21