AP BIOLOGY

Detailed explanation-1: -Gradualism is the slow, steady changes of a particular species. Here, the selection and variation occur more gradually. Hence, gradualism takes a long period of time and the changes are hard to notice within a short period of time.

Detailed explanation-2: -Gradualism is selection and variation that happens more gradually.

Detailed explanation-3: -Thus, the theory of gradualism proposes that changes occur in many small steps, over time. While this is an interesting theory, and probably true to some extent, fossil record analysis have shown that at least some organisms experience much more rapid change.

Detailed explanation-4: -Gradualism in biology and geology refers most broadly to a theory that changes of organic life and of the Earth itself occur through gradual increments, and often that transitions between different states are more or less continual and slow rather than periodic and rapid.

Detailed explanation-5: -A great example of evolutionary gradualism is the lineage of whales. Whales gradually evolved over the course of tens of millions of years from four legged land mammals to aquatic mammals.