Question

model 3 - growth curves
diagram a - exponential growth curve
diagram b - logistic growth curve

1. refer to model 3.

a. during what phase of the growth curves in each diagram is the population just beginning to colonize an area?

b. which type of population growth appears to continue unchecked?

1. the growth curves in model 3 are often referred to using the letters of the alphabet they resemble. the logistic growth curve is sometimes referred to as an s - curve. what letter would you use to describe the exponential growth curve?

Explanation:

• Question 9a: In population growth models, the lag phase is when the population is just starting to establish itself in a new area. It's a period of adjustment where the population size is relatively stable as individuals acclimate to the environment.
• Question 9b: Exponential growth is characterized by a lack of limiting factors (such as space, food, or predators in the early stages of a new habitat with abundant resources). In the exponential growth curve (Diagram A), there is no upper - bound (like the carrying capacity in logistic growth) that stops the growth, so it appears to continue unchecked.
• Question 10: The exponential growth curve has a shape that resembles the letter “J”. It starts with a slow increase (lag phase) and then has a very rapid, accelerating increase in population size.

Answer:

• 9a. Lag phase
• 9b. Exponential growth
• 10. J