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SC.912.L.17.5

SC.912.L.17.5 . Analyze how population size is determined by births, deaths, immigration, emigration, and limiting factors (biotic and abiotic) that determine carrying capacity.

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SC.912.L.17.5

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  1. SC.912.L.17.5 Analyze how population size is determined by births, deaths, immigration, emigration, and limiting factors (biotic and abiotic) that determine carrying capacity.

  2. Thick, low clouds, like sea ice, reflect more sunlight than the open ocean. How would an increase in the number of low clouds over the Arctic Ocean most likely affect the polar bears? • The amount of sea ice would increase, giving the bears more area in which to hunt • The amount of sea ice would increase, making it harder for the bears to find mates • The amount of sea ice would decrease, giving the bears less area in which to hunt • The amount of sea ice would decrease, making it easier for the bears to find and capture seals

  3. Biodiversity refers to the number of different kinds of organisms living in an ecosystem. Which of the following is least likely to reduce the biodiversity in an ecosystem? A. Farmers in an area clear several hundred hectares of forest to grow crops B. Heavy rains cause major flooding in an area, destroying many trees and homes C. When there is a shortage of their usual food, birds switch to a different food source D. People release unwanted pet snakes from a foreign country into the wild

  4. A non-native species is introduced into an ecosystem. How might this introduction harm native species in the ecosystem? • It might result in an increase in predation • B. It might result in an increase in available prey • It might result in a decrease in predation • It might result in a decrease in pathogens

  5. Different ecosystems can support different numbers of organisms. Which of the following is the number of individuals of a species that a particular ecosystem can support? • Population • Community • Biotic potential • Carrying capacity

  6. The growth of populations is limited by factors in the ecosystem. Which of the following is an abiotic limiting factor? • Parasites • Pathogens • Predators • Soil nutrients

  7. If the climate in southern Florida changed so that it was hot and dry year-round, with very little rain, which of the following would most likely occur? • Plant diversity in the area would increase • Animals in the area would find ways to adapt • Plants usually found in deserts would begin to grow in the area • Animals in the area would begin seasonal migrations

  8. Corals live near the surface of the ocean water in some warm regions of the world. The corals provide a home for algae. The algae, in turn, produce food that is used by the corals. Which is a biotic factor in this ecosystem? • Temperature of the water • Salt content of the water • The size of the algae population • The amount of sunlight that reaches the coral

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