8th grade · Science · Unit 6 of 8
Natural Selection
Variation, survival and populations changing over time.
What your child practices
Practices how variation in traits leads some individuals to survive and reproduce more, how populations change over generations, and how artificial selection works.
California Content Standards learning standard: MS-LS4-4; MS-LS4-6 · how trait variation affects survival and how populations change over time
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Individuals with helpful traits are more likely to…
- stop reproducing
- change their DNA on purpose
- die young
- survive and reproduce
survive and reproduce
Hint: Pass on genes.
Question 2
An adaptation is a trait that…
- an organism chooses
- helps an organism survive in its environment
- appears overnight
- harms survival
helps an organism survive in its environment
Hint: Inherited advantage.
Question 3
Which is NOT needed for natural selection?
- Organisms choosing their traits
- Competition
- Variation
- Inheritance
Organisms choosing their traits
Hint: Traits aren't chosen.
Question 4
Dog breeds are a result of…
- erosion
- mutations from food
- artificial selection
- natural selection only
artificial selection
Hint: People bred them.
Question 5
Bacteria becoming resistant to antibiotics is an example of…
- metamorphosis
- erosion
- natural selection
- photosynthesis
natural selection
Hint: Survivors pass on resistance.
Question 6
Corn today looks very different from its wild ancestor because of…
- magnetism
- natural selection in a year
- thousands of years of artificial selection
- erosion
thousands of years of artificial selection
Hint: Farmers chose seeds.