1. What would you estimate the algae population density will be 20 additional years in the future, assuming no environmental changes occur?

2.If you were modeling the growth of the algae population according to the logistic growth model, what would be different between year 6 and year 20? The intrinsic growth rate r is higher in year 6 than in year 20. The intrinsic growth rate r is lower in year 6 than in year 20. The population size N is about equal to K in year 6 and less than K in year 20. The population size N is less than K in year 6 and about equal to K in year 20.

3.If someone added algicide (an algal poison) to the lake, thereby increasing the algal death rate, what would change? Assume that nutrient and sunlight input rates do not change. The algae population would grow slower in this new environment. The algae population would grow faster in this new environment. The carrying capacity of the algae population in this new environment would be lower. The birth rate of the algae population would increase in this new environment.