The genetic drift is the amount the four-factor that affects the mutation, the migration, the genetic drift, and the natural selection and causing the gene pools to change over time and changes are associated with the frequency of the existing gene variations and may cause a disappearance in the number of that species.
<u>This plays a more important role in the evolving species and the together with the mutation and the migration. There are chances that this can increase or decrease over time and occurs in a small population and with the frequent alteration of the genes that have a greater chance of being lost and a possibility of decreasing the genetic diversity of the species.</u>
<span>b. great increase in air, land and water pollution; no one to ensure proper disposal of toxic wastes; increased destruction of habitats; increase in species extinction
An operational definition is used to define the terms of a process which is needed to determine the nature of an item such or its properties such as quantity, chemical composition, etc.
The degree of operationalization vary.
Operational definitions can be defined as labels and concepts in the way they are measured.
For example: The operational definition of weight can be like this:
How many pennies are needed to balance the weight of something.
When we hang something from a spring, how much a spring streches.