Natural Selection
Adaptations
Evolution
Evidence of Evolution
Natural selection and evolution
100
traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species. This enables better survival and reproduction compared with other members of the species, leading to evolution.
What is natural selection?
100
Any inherited characteristic that increases an organisms chance of survival
What is an adaptation?
100
Fill in the blank: Natural selection over many generations causes ______
What is evolution?
100
Bat wings, cat paws, and whale fins are an example of this
Homolgous structure
100
What is the evidence for common descent?
Anatomy, fossils, embryology, DNA
200
What is needed for natural selection to happen?
What is genetic variation?
200
What adaptation do polar bears have and how does it help them?
Polar bears have thick white fur which keeps them warm and allows them to hide from their prey.
200
True or false : populations evolve, not individuals.
True
200
How are fossils used as proof of evolution?
Show how species change over time (oldest buried deepest, most recent near the surface)
200
Organisms best adjusted to their environment are the most successful in surviving and reproducing
What is survival of the fittest?
300
Random errors in DNA during replication
What are mutations?
300
Explain which mouse is better adapted to this environment.
The grey mouse is better adapted to this environment. Its fur color blends in with the environment and therefore is not seen by predators.
300
True or false: evolution happens quickly and can change in one generation
False
300
How is Anatomy used as proof of evolution?
Species that share a common ancestor have body structures that are similar because the common ancestor had those structures
300
In an arctic habitat; are white foxes or grey foxes more likely to survive and why?
White foxes are more likely to survive becase their white coats help them blend into the snow
400
What causes variation in a population?
what are mutations and sexual reproduction?
400
In an environment with food that grows on trees; are animals with long legs more likely to survive than animals with short legs and why?
Yes, animals with long legs, necks or any trait that makes them taller will be more likely to survive because they have easier access to food.
400
Fill in the blank: Organisms with traits that _____ their chances of surviving and reproducing in their environment tend to leave more offspring
What is increase?
400
What does common ancestry mean?
Species that are related shared a common ancestor
400
Why is it bad to use antibacterial soap that only kills 99% of the germs? (In terms of evolution)
Antibacterial soap does not kill the bacteria that can reproduce and evolve; eventually they will not be affected by the soap antibacterial and your soap will be useless
500
The difference in DNA among organisms/individuals
What is genetic variation?
500
May happen to a species when its environment changes but it is unable to adapt
extinction