Natural Selection and Its Mechanisms

The video tutorial by Mr. C explains natural selection using the example of peppered moths. Initially, lighter moths blend with pale trees, giving them a survival advantage. During the Industrial Revolution, pollution darkens trees, favoring darker moths. This illustrates natural selection, where advantageous traits increase in a population. The video distinguishes between inherited and environmental variations, emphasizing that only inherited traits are passed to future generations.

What is the primary focus of Mr. C's biology lesson?

• Cell Division

• Natural Selection

• Photosynthesis

• Genetic Mutation

Why do lighter-colored moths have an advantage in a pale tree environment?

• They are more visible to predators.

• They have a stronger immune system.

• They are faster than darker moths.

• They blend in better with the environment.

What is the role of camouflage in natural selection?

• It makes organisms more visible.

• It provides an advantage by helping organisms blend in.

• It only affects predators.

• It has no effect on survival.

What environmental change occurred during the industrial revolution affecting moths?

• Birds stopped preying on moths.

• Trees became darker due to smoke and smog.

• Moths developed new colors.

• Trees became lighter due to pollution.

How does natural selection lead to changes in a population?

• By reducing the number of offspring.

• By increasing the lifespan of all individuals.

• By favoring individuals with advantageous traits.

• By eliminating all variations.

What must exist in a population for natural selection to occur?

• Environmental stability

• Uniformity

• Variation

• Random mutations

What happens to the traits of individuals that survive and reproduce more?

• They are passed on to the next generation.

• They disappear from the population.

• They remain unchanged.

• They become less common in the population.

What is a classic example of natural selection discussed in the lesson?

• The migration patterns of birds

• The development of antibiotic resistance

• The color change in peppered moths

• The evolution of giraffes' necks

What is the difference between inherited and environmental variation?

• Both are passed to offspring equally.

• Environmental variation is passed to offspring, while inherited variation is not.

• Inherited variation is passed to offspring, while environmental variation is not.

• Neither affects the next generation.

Which type of variation can be passed on to future generations?

• Both types equally

• Inherited variation

• Neither type

• Environmental variation