Bozeman Science
Bozeman Science: R and K Selection
Paul Andersen explains the differences between an r and a K selected species. He starts with a brief description of population growth noting the importance of; r or growth rate, N or number of individuals in the population, and K the...
Bozeman Science
Bozeman Science: Logistic Growth
Paul Andersen explains how populations eventually reach a carrying capacity in logistic growth. He begins with a brief discussion of population size ( N ), growth rate ( r ) and exponential growth. He then explains how density dependent...
PBS
Pbs Learning Media: Baby Animals
Observe the growth rates of a calf, chick and piglet. See how three children used the scientific method to determine which of these animals grows the fastest.