NEET BIOLOGY

Detailed explanation-1: -Natural selection explains how genetic traits of a species may change over time. This may lead to speciation, the formation of a distinct new species. Select from these resources to teach your classroom about this subfield of evolutionary biology.

Detailed explanation-2: -Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.

Detailed explanation-3: -In the most general sense, evolution means “change”. Biologists are very specific about the kinds of processes that qualify as “evolution” in the biological sense. Biological evolution is genetic change in a population over time.

Detailed explanation-4: -Evolution is heritable change over time, through which species change, diverge, and sometimes create new lineages. “Evolution” and “natural selection” are often used interchangeably, but the two are distinct: evolution is the pattern, and natural selection is one of many mechanisms that cause evolution.

Detailed explanation-5: -The classic example of evolutionary change in humans is the hemoglobin mutation named HbS that makes red blood cells take on a curved, sickle-like shape. With one copy, it confers resistance to malaria, but with two copies, it causes the illness of sickle-cell anemia.