Social factors can influence the evolution of a system. For example, when more women joined the work force, the need for quality child care rose. (a) Name two systems, and for each one list two social factors that have caused those systems to evolve. Discuss your answers with a partner. K/U (b) From your discussions, add one more system to your list and describe two social factors that caused it to evolve. K/U T/I

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.