Natural Selection and Evolution Fundamentals

The video explains evolution and natural selection, clarifying common misconceptions. Evolution is a process affecting populations over long periods, not individuals. Natural selection is illustrated through examples, showing how advantageous traits increase survival and reproduction chances. The concept of natural selection is further explored, emphasizing its reliance on heritable traits rather than acquired characteristics.

What does evolution NOT involve?

• Genetic traits being passed down through generations

• An organism changing when in danger

• Populations evolving over millions of years

• Individuals magically transforming into other species

What is a misconception about evolution?

• It requires millions of years

• It happens to populations, not individuals

• It is driven by natural selection

• It involves organisms changing in response to immediate needs

What is a key driver of evolution?

• Natural selection

• Artificial selection

• Rapid individual adaptation

• Short-term environmental changes

In the example given, what trait gave an individual an advantage?

• Better eyesight

• Thicker fur

• Longer legs

• Stronger arms

How does natural selection affect the frequency of traits in a population?

• It has no real impact on genetic traits

• It increases the frequency of advantageous traits

• It decreases genetic diversity

• It ensures all individuals are identical

What percentage of the population had long legs by the third generation?

• 33%

• 50%

• 100%

• 67%

Why is it called 'natural selection'?

• Because it's a random process

• Because it only occurs in natural environments

• Because nature itself selects the traits

• Because it's a man-made process

Which of the following is NOT selected for in natural selection?

• Genetic traits

• Advantageous physical traits

• Acquired skills

• Heritable traits

What is essential for a trait to be considered in natural selection?

• It must be acquired during the organism's lifetime

• It must be taught

• It must be a physical strength

• It must be heritable

What does natural selection act on?

• Short-term changes

• Population-wide traits

• Individual behaviors

• Non-genetic characteristics