Video Notetaker: “How Does Evolution Really Work?”
The primary way evolution
occurs is through the action of natural selection. Be sure to pay attention to how the
hummingbirds being studied in
1. What is meant by “natural selection”?
2. Who identified natural selection as the key
evolutionary mechanism?
3. The four key processes of natural selection
are listed in the chart. Provide a description
for each and identify what is discussed for that process with respect to the
hummingbirds.
|
Process |
Description |
Hummingbirds |
|
genetic variation |
|
|
|
overproduction of
offspring |
|
|
|
struggle for existence |
|
|
|
differential survival and
reproduction |
|
|
4. For hummingbirds that live in an environment with long flowers, it would be more advantageous for them to have ________________________ .
This is not
the best characteristic for them to have, so why is it advantageous for them?
What would
happen if they had the opposite?
5. Can a
species develop adaptations that benefit them in their lifetimes?
hummingbirds example:
Where does
this characteristic come from?
6. What modern
evidence is being studied for the hummingbirds to reconstruct their
evolutionary history?
What does
this evidence tell us about the evolution of the hummingbirds?
7. What did
How would
this effect life on Earth over time?
Examine your results from
the Peppered Moth Activity. What
processes of natural selection did you observe in action during this
experiment? Be sure to include data from
the experiment to support your statements.
Questions I still
have: