Populations Study Guide (Exponential Growth)

1. Populations Study Guide(Exponential Growth)

2. What is a Population All the members of the same species living in the same place at the same time. • Which of the following would be an example of a population? • A. All the palm trees and bushes on an island. • B. All the humans at a high school basketball game. • C. All the different groups of fish and algae in a lake. • D. None of the above

3. Characteristics of a Population • Geographic Distribution – • area in which population lives • Population Density – • number of individuals in an area • Growth – • the amount by which the population size changes in a given time period.

4. Characteristics of a Population • Which of the following is one of the main characteristics used to describe a population? A. number of individuals B. color of individuals C. number of species D. kind of adaptations

5. Which of the following correctly shows the levels of organization from smallest to largest? • A. organism, population, community, ecosystem, biome, biosphere • B. organism, community, biome, ecosystem, population, biosphere • C. biosphere, biome, ecosystem, community, population, organism • D. biosphere, population, biome, community, ecosystem, organism

6. The levels of the Biosphere • Biosphere levels from largest to smallest • BIOSPHERE • BIOME • ECOSYSTEM • COMMUNITY • POPULATION • ORGANISM

7. Population Affects Food Webs • If the population of producers decrease, then the population of primary consumers will decrease if they don’t have enough food.

8. Populations and Food Webs • If the population of primary consumers decrease: • Then the producer population increases because there are less consumers eating them. • The secondary consumer population decreases because there is less food for them.

9. What will Happen to food webs if a population changes? • If a population of organisms of any level in a food web changes it will: • A. Have no affect at other levels • B. Only affect the population that changes • C. Affect populations at the other levels • D. None of the above.

10. Which organism will be most affected in the food web if the rabbit population decreases? • A. MOUSE • B. SNAKE • C. JACKAL • D. LION

11. Populations are affected by many resources: • These are: • The amount of available food in an area. • The amount of sunlight (if a plant) • The amount of water • The competition for food/shelter • The predators in an area

12. As resources in a population start to decrease, the population growth will: • A. declines rapidly. • B. increases slowly. • C. reaches carrying capacity. • D. enters a phase of exponential growth.

13. Changes in Population Size • Growth factors • Immigration: individuals moving into a population • Births • Shrinking factors • Emigration: individuals moving out of a population • Deaths

14. Which are two ways a population can decrease in size? • A. immigration and emigration • B. increased death rate and immigration • C. decreased birthrate and emigration • D. emigration and increased birthrate

15. Unlimited Growth • If there are no limiting resources, populations grow exponentially. • Birth Rate > Death Rate

16. Which of the following graphs shows a population with unlimited resources? • B. • A. • C. • D.

17. Exponential Growth • Early phase of growth • High availability of resources • Little competition • Little predation

18. When individuals in a population reproduce at a constant rate, it is called? • A. logistic growth. • B. growth density. • C. exponential growth. • D.multiple growth.

19. Which statement below best describes the population shown in the graph? • A. There are more births than deaths. • B. There are less births than deaths • C. Births and Deaths are equal • D. The birth rate equals ZERO.

20. Human Population Growth Are humans in exponential or logistic growth?