Question

What is natural selection and its types?

Answer 1

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Directional selection, stabilizing selection and disruptive selection are three types of natural selection. They are also examples of adaptive evolution. Natural selection is the mechanism of evolution which favors organisms that are better adapted to their environments.

Answer 2

Natural selection is the process by which organisms with advantageous traits are more likely to survive and reproduce. There are three types of natural selection: stabilizing, directional, and disruptive.

Step-by-step explanation:

Natural selection is the process by which organisms that are better adapted to their environment have a greater chance of surviving and reproducing, passing on their advantageous traits to future generations. There are three types of natural selection:

1. Stabilizing selection: This occurs when individuals with intermediate traits have higher fitness compared to those with extreme traits. For example, in a bird population, individuals with average-sized beaks may have an advantage in accessing a variety of food sources.
2. Directional selection: This occurs when individuals with one extreme trait have higher fitness compared to those with the other extreme trait. For instance, in a population of giraffes, individuals with longer necks may have an advantage in reaching leaves on tall trees.
3. Disruptive selection: This occurs when individuals with extreme traits at both ends of the spectrum have higher fitness compared to those with intermediate traits. An example is a population of snails where individuals with very light or very dark shells are better camouflaged and have a higher chance of survival compared to those with intermediate shell colors.