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Evolution
- Extinction
- Death of an entire species
- Dinousars
- Death of an entire species
- Adaptation
- A trait that
helps the
entire
population
- Dense Bones
- A trait that
helps the
entire
population
- Mutation
- Random
changes in DNA
- One seal is
born with a
change in its
DNA sequence
that makes its
flipper wider
- Random
changes in DNA
- Natural Selection
- Organisms with helpful traits
survive better
- Due to a change in the
environment, a few gray moths
are able to blend in to the
environment better and survive
long enough to produce offspring
- Organisms with helpful traits
survive better
- Environmental Pressure
- Activities or factors
that cause change
within the ecosystem
- A drought, so the land is too dry
- Activities or factors
that cause change
within the ecosystem
- anatomical Similarity
- Organisms with similar
skeleton may have come from
a common ancestor
- The arm of a human is similar to the
leg of a cat, the flipper of a whale,
and the wing of a bat
- Organisms with similar
skeleton may have come from
a common ancestor
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