Question

list three examples of populations in the state of Alabama. 2what are three ways to describe a population 3 define growth rate 4what is the formula for figuring out the change in population size

Answer 1

1) Three examples of populations in Alabama
- White-tailed deer in Tuscaloosa County (all deer of that species living there).
- Bottlenose dolphins in Mobile Bay.
- Red‑cockaded woodpeckers in Conecuh National Forest.

2) Three ways to describe a population
- Size (N): the total number of individuals.
- Density: number of individuals per unit area (or volume).
- Dispersion (spatial distribution): how individuals are spread (clumped, uniform, or random); alternatively you could use age structure or sex ratio.

3) Define growth rate
- Growth rate is the change in population size per unit time. Often expressed as a per‑capita rate (r) equal to the change in population divided by population size and time.

4) Formula for change in population size
- Absolute change: ΔN = (B − D) + (I − E)
where B = births, D = deaths, I = immigration, E = emigration.
- Per‑capita/instantaneous forms: r = (ΔN/Δt)/N, and for continuous exponential growth dN/dt = rN.