Question

it is the measure of the number of people living in a unit area of the earth​

Answer 1

Answer:

Two important measures of a population are population size, the number of individuals, and population density, the number of individuals per unit area or volume. Ecologists estimate the size and density of populations using quadrats and the mark-recapture method.

Answer 2

Answer:

1area=50members people who living in a earth =1,00,00,000000,0000