Individuals leaving or departing a population is known as

One way species combat genetic drift is through the migration of alleles. This is called gene flow. Gene flow is when alleles either enter or exit a population. Entering is called immigration, and exiting is called emigration.

Explanation:

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.