Northern flickers (a kind of woodpecker) live on Santa Catalina Island in California. Let's say a population of 1000 flickers lives on the island. If over a 3-year period, the birth rate remains stable at 500 flickers per 1000 individuals per year and the death rate remains stable at 300 flickers per 1000 individuals per year, what would be the size of the population at the end of 3 years, assuming no migration to or from the island

Population in 3rd year  = 1,728

Explanation:

Given:

Population = 1,000 flickers

Birth rate = 500 per 1,000

Death rate = 300 per 1,000

Number of year = 3

Computation:

Population in 1st year  = 1,000 + 500 - 300

Population in 1st year  = 1,200

Population in 2nd year  = 1,200 + [1,200][500/1,000] - [1,200][300/1,000]

Population in 2nd year  = 1,440

Population in 3rd year  = 1,440 + [1,440][500/1,000] - [1,440][300/1,000]

Population in 3rd year  = 1,728

condenser is used to focus in the light microscope.