8Limiting factors Definition Examples Factor that causes the growth of a population to decreaseFoodWaterPredationSpaceDisease
9The size of a mouse population in a natural ecosystem tends to remain relatively constant due to 1.the carrying capacity of the environment2.the lack of natural predators3.cycling of energy4.increased numbers of decomposers
10A population of chipmunks migrated to an environment where they had little competition. Their population quickly increased but eventually stabilized as shown in the graph.Which statement best explains why the population stabilized?Interbreeding between members of the population increased the mutation rate.The population size became limited due to factors such as availability of food.An increase in the chipmunk population caused an increase in the producer population.A predator species came to the area and occupied the same niche as the chipmunks.
11The graph provides information about the population of deer in a given area between 1900 and Which statement identifies the most likely reason that the carrying capacity of the area to support deer decreased between 1925 and 1930?The deer population decreased in 1926.The number of predators increased between 1915 and 1925.The deer population became too large.An unusually cold winter occurred in 1918
12The graph shows the changes in two populations in herbivores in a grassy field. A possible reason for these changes is thatall of the plant populations in this habitat decreasedpopulation B competed more successfully for food than population A didpopulation A produced more offspring than population B didpopulation A consumed the members of population B