Natural Selection - Survival of the Fittest

The video explains the concept of evolution, highlighting the interconnectedness of all living things through a family tree of life. It discusses Charles Darwin's revolutionary theory of natural selection, which describes how species evolve over time through variation and survival of the fittest. The process of natural selection is detailed, showing how it leads to the adaptation and formation of new species, resulting in the diverse forms of life we see today.

What did Charles Darwin propose about the nature of species?

• Species are fixed and unchanging.

• Species do not evolve.

• Species are in constant change.

• Species were created separately.

According to Darwin, what is the main mechanism driving evolution?

• Artificial selection

• Natural selection

• Random chance

• Genetic mutation

Which of the following is NOT one of the four basic points of natural selection?

• Individuals best suited to their environment are more likely to survive.

• All individuals survive to reproduce.

• Traits are inherited from parents.

• Variation exists within species.

What happens to individuals that are not well adapted to their environment?

• They thrive and reproduce.

• They migrate to a new environment.

• They become dominant in the population.

• They die off.

How does natural selection affect genetic variation over time?

• It increases bad genetic variation.

• It preserves good genetic variation.

• It eliminates all genetic variation.

• It has no effect on genetic variation.