Theory is often referred to what?
a hunch or speculation
What do Scientists call their hunches?
What is a scientific theory?
a comprehensive explanation of some aspect of nature that unifies a vast body of reliable evidence
How is a theory made?
when a substantial number of hypothesis point to the same conclusion
In Science, a Theory:
- explains a natural phenomenon
- predicts occurrences or observations of the same kind
- can be tested through experiment or otherwise verified through empirical observation
- supported by a vast of reliable knowledge
What is evolution?
the change in genetic characteristics of a group of organisms over time
How do we know Evolution has occurred?
- the physical and behavior characteristics of species
- their distributions
- fossil record
- DNA found in organisms
What is the Theory of Evolution?
the scientific explanation for how evolution occurred past and present
What term do Scientists use to refer to an explanation that has been confirmed and tested so many times that it isn't necessary anymore?
Is Evolution a Fact or Theory?
Know the Advantages and Disadvantages of sexual and asexual reproduction
Look at your notes
What is sexual reproduction?
the process of forming a new individual from two parents
What is asexual reproduction?
the process of forming a new individual from one parent
What did Charles Darwin do after college?
He served as naturalist on a ship
What is selective breeding (artificial selection)?
the process in which humans select which plants or animals to reproduce based on certain desired traits
What was Darwin's theory about evolution?
that it happens through a process called natural selection
What is natural selection?
when individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals (survival of the fittest)
Four Parts of Natural Selection:
2. Inherited Variation
3. Struggle to Survive
4. Successful Reproduction
some offspring will survive some will not
each offspring has different combination of traits
Struggle to Survive
only some offspring will survive to adulthood
organisms best adapted to their environment are likely to have many offspring to survive
Separation, Adaptation, Division