Topic 8.4

Multiple Choice

What is carrying capacity (K)?

• The maximum number of individuals in a population that can be supported by the environment

• The size of a population that can be supported in an environment when it is unchecked.

• The number of new individuals that can migrate into a population and be supported by the environment

Multiple Choice

What is the formula for logistic growth

• $$\frac{\text{d}N}{\text{d}t}=rN\left(\frac{\left(K-N\right)}{K}\right)$$  

• $$\frac{\text{d}N}{\text{d}t}=\left(\frac{\left(r-N\right)}{K}\right)$$  

• $$\frac{\text{d}N}{\text{d}t}=\frac{N\left(B-D\right)}{\left(rK\right)}$$  

Multiple Choice

Why does growth slow down as the population approaches K?

• There is resistance to further growth because of the environment

• There are more births

• Competition decreases

• There's a sudden increase in available food

Multiple Choice

Why does the population overshoot the carrying capacity?

• There is a lag between the depletion of resources and the population's response to that depletion.

• The carrying capacity is constantly changing

• The Growth rate and death rate constantly fluctuate

Reorder

_1_-selected species tend to have __2__ growth curve because their early growth and rapid development.

On the other hand _3_-selected species tend to have __4__ growth curve because there is healthy competition and efficiency in using their resources.

• r

• exponential

• k

• logistic

1

2

3

4

• 1
• 2
• 3
• 4