Exploring Selection in Biology

Mr. Andersen discusses selection, including natural, artificial, and sexual selection. He uses analogies and examples, such as kickball and dog breeding, to explain how selection works. The video covers the importance of variation, the role of humans in artificial selection, and the environmental factors in natural selection. It also delves into sexual selection, highlighting the role of females in choosing traits for the next generation.

What is an example used to explain the concept of selection?

• Choosing a book to read

• Choosing team members in a game

• Selecting a meal at a restaurant

• Picking a movie to watch

What does variation refer to in the context of selection?

• Differences in physical traits among individuals

• Uniformity in characteristics

• Lack of genetic diversity

• Similar environmental conditions

What is the primary mechanism behind artificial selection?

• Random mutations

• Natural disasters

• Human choices

• Environmental factors

Who is known as the father of the green revolution?

• Norman Borlaug

• Gregor Mendel

• Charles Darwin

• Albert Einstein

Which selection type is illustrated by the breeding of dogs like Chihuahuas and St. Bernards?

• Ecological selection

• Sexual selection

• Natural selection

• Artificial selection

What type of selection favors traits that help survival in changing environmental conditions?

• Artificial selection

• Disruptive selection

• Directional selection

• Stabilizing selection

What is an example of stabilizing selection in humans?

• Average baby weight

• Height variations

• Hair color diversity

• Eye color variations

What does disruptive selection potentially lead to?

• Decrease in genetic diversity

• Formation of new species

• Stabilization of a single trait

• Reduction in population size

Which type of selection involves females choosing mates based on desirable traits?

• Sexual selection

• Artificial selection

• Natural selection

• Ecological selection

Why is sexual selection important in evolutionary terms?

• It leads to genetic diversity

• It stabilizes the ecosystem

• It reduces genetic mutations

• It ensures survival of the fittest