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Transcript
•
The process by which populations become
adapted to their environments, over many
generations, is called evolution by natural
selection.
•
Natural selection is unequal survival and
reproduction of organisms resulting from
inherited traits or characteristics. SURVIVAL OF
THE FITTEST.
•
•
Natural selection is unequal survival and
reproduction of organisms resulting from
inherited traits or characteristics. SURVIVAL OF
THE FITTEST.
Traits or skills that are learned are not passed on
to offspring.
A. All organisms have the ability to produce more
offspring than can survive.
B. The environment is hostile and can kill
organisms.
C. Individuals vary, or differ, in their inherited traits.
D. Some inherited traits give individuals an
advantage in competition or survival.
E. Individuals with inherited traits which give them
an advantage have more offspring and this
inherited trait becomes more numerous in the
population.
- Darwin’s Theory

Natural selection is the process by which individuals
who are better adapted to their environment are
more likely to survive and reproduce than other
members of the same species.
- Darwin’s Theory

Variations among turtles make some of them better
able to survive. Turtles that survive to become adults
will be able to reproduce.
•
•
•
A mutation is a change in the DNA sequence of a
cell.
Most mutations have no effect, but some
mutations give an individual organism an
advantage.
These advantageous mutations may be passed on
become adaptations.
•
An adaptation is an inherited trait that gives an
organism an advantage and is passed on and
becomes part of the population.
•
•
An adaptation is an inherited trait that gives an
organism an advantage and is passed on and
becomes part of the population
Coevolution is when two or more species evolve in
response to each other. Like predator and prey –
prey get better at avoiding getting eaten, so the
predator have to get better at catching prey.
•
•
•
An adaptation is an inherited trait that gives an
organism an advantage and is passed on and
becomes part of the population
Coevolution is when two or more species evolve in
response to each other. Like predator and prey –
prey get better at avoiding getting eaten, so the
predator have to get better at catching prey.
When a species cannot adapt, it disappears and
becomes extinct, like dinosaurs.