Today we're gonna learn about evolution
or descent with modification
That's what my man Darwin called it
When he studied on the islands
Observing resemblance, adaptations
Now, Darwin came up with some osbervations
Four exactly, here's number one
Species traits can very greatly
Oh, traits are inherited from parent to offspring
Everyone can make more than carrying capacity
A lack of resources make offspring die
Oh yes I said it, I said it
Now onto inferences
Individuals with a higher fitness
They tend to reproduce and survive
More often than others
And this inequality leads to an accumulation of favored traits
Natural selection
By adaptations
When it all comes down, two things are needed for success
Organisms need food
Organisms need sex
Without these, they won't pass down traits
(they kinda need to pass down traits)
Evolution relies on diversity
Mutations and sex cause variability
They make chances of survival so great
Hardy-Weinberg
Hardy and Weinberg
Exclusion principle
For gene frequencies to stay constant
All these factors gotta be in action
Random mating, big population
No gene flow or mutations
And absolutely NO natural selection
Oh but this never happens
Never in equilibrium
No, no, no, no, no, no, no, no, no, nooo
Oh just let the environment choose
Which organism will lose
Yeah, yeah, yeah, yeah, yeah, yeah, yeah, yeah, yeah
yeahhhh
Ohhh
Today you learned about evolution
Or descent with modification
This may have all seemed tedious
But it's the key to passing the AP test
This single theme never goes away
Natural selection
By adaptations
Natural selection
 
