What are the 4 types of natural selection?

Stabilizing, Directional, and Diversifying Selection. Stabilizing, directional, and diversifying selection either decrease, shift, or increase the genetic variance of a population.

What does Darwin’s diagram represent?

The Tree Diagram encompasses the idea that natural selection explains common descent and the origin of organic diversity, thus representing a comprehensive model of Darwin’s theory on the origin of species.

What’s an example of disruptive selection?

Disruptive Selection Examples: Color Light-colored oysters would blend into the rocks in the shallows, and the darkest would blend better into the shadows. Thus, with fewer of the medium individuals surviving to reproduce, the population eventually has more oysters colored to either extreme of the spectrum.

What are the 4 observations of natural selection?

Darwin’s process of natural selection has four components.

• Variation. Organisms (within populations) exhibit individual variation in appearance and behavior.
• Inheritance. Some traits are consistently passed on from parent to offspring.
• High rate of population growth.
• Differential survival and reproduction.

What did Darwin sketch in his notebook?

Darwin made the sketch at age 28, shortly after returning from his worldwide expedition aboard the HMS Beagle. The other notebook contains Darwin’s notes on his theory of evolution in terms of geographical distribution, the origin of humans, and classification by descent, according to Cambridge University Library.

What does the I think sketch in Darwin’s notebook represent?

Part of the Darwin exhibition. Darwin relied on his notebooks. This drawing, with the most ancient forms at the bottom and their descendants branching off irregularly along the trunk, reveals that Darwin understood all plants and animals are related. …

What is disruptive selection simple?

Disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.

What is selection example?

The definition of a selection is a person or thing that’s been picked or are available to pick. An example of a selection is a cat chosen from a litter of kittens. An example of a selection is a litter of kittens to choose from at the humane society.