1.) Two different populations of commander butterfly were studied over a period of two years. The following results were obtained. Population size of commander butterflies Population| Original size| Final size 1 2436 2873 2 2185. 2649 Which of the following concepts would best compare the change in population size of the two populations? A.) Growth rate (gr ) B.) Biotic potential (r) C.) Density (Dp ) D.) Per capita growth rate (cgr ) 2.) When population density reaches the carrying capacity of the environment, the death rate in the population becomes A.) less than the birth rate B.) equal to the birth rate C.) more than the emigration rate D.) more than the immigration rate

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Population Growth

R and K Selection

R and K selection are concepts in ecology used to describe traits in the fluctuation of a population or population dynamics. For example, they describe the life-association traits between parent and offspring, such as quantity or number of young ones born at a time, quality of parental care, the age to maturity, and reproductive effort.