Biology Essentials- Logistic Growth (S-shaped curve)
Guided Viewing Worksheet:
1: What is N?
N=population size
2: What is r? What is the equation for r?
R (growth rate) = (births-deaths)/ N(population size)
3: What did Darwin realize about elephants and their reproductive rate?
Darwin realized that elephants have the slowest reproduction rate.
4: What is K?
K= The limiting population
5: What is the equation for exponential growth (j shaped curve)?
Change in dN/dt=r N
6: For logistic growth, what changes from exponential growth?
They add (K-N/K) to dN/dt=r N at the end of the equation.
7: What happens if r is bigger than 0?
Exponential growth would occur.
8: What is an r selected species? Give an example.
A great example would be a frog left in a body of water with no fish. This is a species that love to grow quickly.
9: What is a K selected species? Give an example.
These species have a slow growth rate. An example would be a chameleon.
10: What kind of selected species are humans?
Humans are K selected species.
N=population size
2: What is r? What is the equation for r?
R (growth rate) = (births-deaths)/ N(population size)
3: What did Darwin realize about elephants and their reproductive rate?
Darwin realized that elephants have the slowest reproduction rate.
4: What is K?
K= The limiting population
5: What is the equation for exponential growth (j shaped curve)?
Change in dN/dt=r N
6: For logistic growth, what changes from exponential growth?
They add (K-N/K) to dN/dt=r N at the end of the equation.
7: What happens if r is bigger than 0?
Exponential growth would occur.
8: What is an r selected species? Give an example.
A great example would be a frog left in a body of water with no fish. This is a species that love to grow quickly.
9: What is a K selected species? Give an example.
These species have a slow growth rate. An example would be a chameleon.
10: What kind of selected species are humans?
Humans are K selected species.