Natural Selection

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

True or False: Natural selection occurs during the lifetime of a single organism.

Back

False. Natural selection occurs over generations, not during the lifetime of a single organism.

Front

Why did the population of peppered moths in England change from light to dark after the Industrial Revolution?

Back

Light moths were easy to see against sooty trees and were eaten.

Front

What is a mutation?

Back

A mutation is a change in the DNA sequence of an organism that can lead to new traits.

Front

What are adaptations?

Back

Adaptations are traits that improve an organism's ability to survive and reproduce in its environment.

Front

Give an example of a structural adaptation.

Back

The long neck of a giraffe is a structural adaptation that allows it to reach high leaves.

Front

What is camouflage?

Back

Camouflage is an adaptation that allows an organism to blend in with its environment to avoid detection by predators.

Front

What did Darwin say about variation within a species?

Back

Darwin said that within a species there will be variation/differences.

Front

What is the role of competition in natural selection?

Back

Competition for resources leads to survival of the fittest, where only the best-adapted individuals survive.

Front

What is selective breeding?

Back

Selective breeding is the process by which humans breed plants and animals for specific traits.