In a graphing paper, construct age structure diagrams for country A and B using the given data below. Label your graphs completely. Use the following color as your legend: purple: pre-reproductive, green: reproductive and blue: post-reproductive. A B Total population (millions) 140 80 Pre-reproductive Reproductive Post-reproductive 45 12 92 47 3 21 a. In which of the countries above would you expect to see a rapid increase within the next few generations? Why? b. Imagine that the graphs show populations of two different species that people want to protect. Which species is likely to need the most protection and management in the near future? Why?

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.