Variation & Survival Advantage
Use evidence to explain how variations in characteristics among individuals of the same species may provide advantages in surviving, finding mates, and reproducing
What a learner can do afterwards
- Explain that variation within a species means some individuals have traits better suited to their environment
- Give examples of advantageous variations (e.g. camouflage, speed, drought resistance in plants)
- Connect variation to survival advantage: individuals with beneficial traits are more likely to survive and reproduce
1 · Read
You know young living things inherit traits from parents yet no two look exactly the same. Look closely at a group of rabbits in the wild. They are the same species, but they are not identical. Some run faster than others. Some notice danger sooner. This kind of difference is called variation, and it can decide which rabbits stay safe.
A gray, speckled moth lands on tree bark and is hard to see. A solid black moth lands on the same bark and stands out. A hungry bird finds the black moth first. The gray moth's coloring is a variation that helps it survive, because camouflage makes it harder to catch.
Surviving is only part of the story. A helpful trait can also help an animal find a mate and have young that inherit the same trait, so the trait keeps helping the next generation too. A plant that needs less water can keep growing in a dry summer.
Individuals in a species have different traits, and traits that help them survive and reproduce give them a survival advantage.
The rewritten reading was written for this dataset.
2 · Watch
Take it off screen
Where it sits
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.