Logistic Growth
Biology Essentials- Logistic Growth (S-shaped curve)
Guided Viewing Worksheet
1: What is N?
Population size
2: What is r? What is the equation for r?
Growth rate
r=(births-deaths)/N
3: What did Darwin realize about elephants and their reproductive rate?
If you let elephants reproduce after 5 centuries you're going to have millions of them
4: What is K?
carrying capacity
5: What is the equation for exponential growth (j shaped curve)?
dN/dt=rN
6: For logistic growth, what changes from exponential growth?
(K-N)/K is added to the equation
7: What happens if r is bigger than 0?
exponential growth will happen
8: What is an r selected species? Give an example.
birth is as fast as possible example frogs
9: What is a K selected species? Give an example.
birth rate is slow example chameleon
10: What kind of selected species are humans?
we are k selected speccies
Guided Viewing Worksheet
1: What is N?
Population size
2: What is r? What is the equation for r?
Growth rate
r=(births-deaths)/N
3: What did Darwin realize about elephants and their reproductive rate?
If you let elephants reproduce after 5 centuries you're going to have millions of them
4: What is K?
carrying capacity
5: What is the equation for exponential growth (j shaped curve)?
dN/dt=rN
6: For logistic growth, what changes from exponential growth?
(K-N)/K is added to the equation
7: What happens if r is bigger than 0?
exponential growth will happen
8: What is an r selected species? Give an example.
birth is as fast as possible example frogs
9: What is a K selected species? Give an example.
birth rate is slow example chameleon
10: What kind of selected species are humans?
we are k selected speccies