REVIEW: Population Biology (B4)

Refer to Graphs A and B to answer the following questions. What type of population growth is shown in Graph A? logistic exponential Which graph shows the most likely growth of a NEW squirrel population living in a forest with ample space and lots of food? Graph A Graph B Which graph shows a population's growth under normal conditions, including limits on space and food? Graph A Graph B Complete the following statement: Populations of organisms don't grow indefinitely because of limiting factors. Use each of the terms below just once to complete the passage. The number of organisms of one species that an environment can support is called its carrying capacity. If the number of organisms in a population is under the environment's carrying capacity, births exceed deaths and the population grows. If the number of organisms rises above the carrying capacity of the environment, deaths will exceed births. This pattern will continue until the population is once again at or below the carrying capacity. Population Pyramids-Predictors of the Future Watch the short video and then complete the section that follows. Studying Human Populations The first two age structure graphs for country X show the percent of the population in each age group for the years 1980 and 2000. The remaining two graphs are projections of how the age structure of country X will change. Use the graphs to answer the questions. In 1980, does country X exhibit an age structure more typical of a poor nation or a wealthy nation? developing industrialized What kind of growth is country X experiencing in 1980? rapid slow stable growth declining How did country X's population change from 1980 to 2000? more people living to older age more people of reproductive age more children In 2080, will country X exhibit an age structure more typical of a developing nation or an industrialized nation? developing industrialized Organism Interactions The snowshoe hare is a primary source of food for the Canadian lynx. How does the lynx population size change when the hare population increases? it decreases it increases it stays the same How does the change in the LYNX population size affect the hare population? directly (if lynx goes up, hare goes up) inversely (if lynx goes up, hare goes down) there is no effect on the hare population What is the relationship between the lynx and the hare called? mutualism commensalism predation parastitism