U2: Ecological and Human Populations

U2: Ecological and Human Populations

1. Which is not a population? A. The earthworms living under the ground at ECHS. B. The koi fish swimming in the pond at ECHS. C. The human beings living in LA. D. The spiders living on the ECHS campus.

Population Growth Patterns (ONLY GROWTH) dn dt = b d N (b d) = intrinsic growth rate Faster indv. reproduce, faster pop rises. Exponential growth

2. What does this graph say? A. Exponential growth forever. B. Exponential growth until carrying capacity is reached. C. Exponential growth until CC, then rises and falls as food is consumed. D. Exponential growth until CC, then population crash.

3. What does this graph say? A. Exponential growth forever. B. Exponential growth until carrying capacity is reached. (Logarithmic) C. Exponential growth until CC, then rises and falls as food is consumed. D. Exponential growth until CC, then population crash.

4. What does this graph say? A. Exponential growth forever. B. Exponential growth until carrying capacity is reached. (Logarithmic) C. Exponential growth until CC, then rises and falls as food is consumed. D. Exponential growth until CC, then population crash.

5. What type of pop fluctuation is this? A. Stable B. Irruptive C. Cyclic D. Irregular

6. What type of pop fluctuation is this? A. Stable B. Irruptive C. Cyclic D. Irregular

7. The best label for the axis labeled 2 in the graph is: A. Time B. Population number C. Logistic growth rate D. Environmental resistance 1 B C D K E. Birth rate A 2

8. What does this graph say? A. Exponential growth forever. B. Exponential growth until carrying capacity is reached. (Logarithmic) C. Exponential growth until CC, then rises and falls as food is consumed. D. Exponential growth until CC, then population crash.

9. What type of pop fluctuation is this? A. Stable B. Irruptive C. Cyclic D. Irregular

10. Which of the following phrases best describes the line K in the graph? A. The rate of population growth B. The carrying capacity of the environment C. The time it takes for the population to double in size D. The number of individuals in the population at the beginning of the study E. The birth rate of the population 1 A B 2 C D K

11. Which of these would NOT be a factor for K? A. Food supply B. Ability to camouflage C. How generalist/specialist the species is D. Number of nearby competitors E. All are factors!

12. The population is growing at its highest rate at which letter? A. A B. K C. D D. B E. C 1 B C D K A 2

Other Terms r-selected and k-selected may also be written as: r-strategist and k-strategist Because their strategy for survival is different. How?

13. Which of the following organisms would be an example of an r-strategist? A. Whale B. Cockroach C. Eagle D. Dog E. Alligator

14. A population has a growth rate of 2% per year. How long will it take for this population to double? A. 70 years B. 40 years C. 35 years D. 15 years E. 2 years

15. Which of the following is a density independent population factor? A. Number of parasites in the population B. Number of predators in the population C. Competition for resources D. Disease E. Habitat destruction

16. Which of the following are exhibited by k-select organisms? I. Slow maturation II. Many small offspring III. Reproduction occurs late in life A. I only B. II only C. III only D. I and II only E. I and III only

17. When a population encounters environmental resistance it is most likely to: A. Continue its high growth rate B. Mutate to form and continue growing C. Slow down its growth rate D. Move to a higher growth rate E. Have no effect on the growth rate

19. Which country had zero population growth last year? b (no./1,000/yr) d (no./1,000/yr) i (no./1,000/yr) e (no./1,000/yr) Country A 20 20 10 5 Country B 10 5 20 10 Country C 30 20 5 15 Country D 65 50 10 10 Country E 10 5 10 10

20. Which country had negative population growth last year? b (no./1,000/yr) d (no./1,000/yr) i (no./1,000/yr) e (no./1,000/yr) Country A 20 20 10 5 Country B 10 5 20 10 Country C 30 20 5 15 Country D 65 50 10 10 Country E 10 5 5 15

21. A boom-and-bust population change that repeats can be said to be: A. Cyclic B. Irruptive C. Stable D. Logistic E. Irregular

22. Your country has recently won a war, and the soldiers have returned home to their wives and families after many long years. What might the age-structure diagram look like if plotted over the next several decades? A. A narrowness at the bottom that will rise over the next several decades because of a boom in population. B. There will be no change in the shape of the agestructure diagram. C. A bulge at the bottom that will rise over the next several decades because of a bust in the population. D. A narrowness in the bottom that will rise over the next several decades because of a bust in the population. E. A bulge at the bottom that will rise over the next several decades because of a boom in the population.

23. Video Review: In the transitional phase from Pre- Industrial to Industrial economies, birth rates while death rates. A. do not change, drop B. increase, remain the same C. decrease, decrease D. decrease, remain the same E. increase, increase

24. Video Application: Which provision might BEST be used as part of an anti-natalist policy in a country whose religious beliefs are against contraception? A. Legally mandated sterilization after two children. B. Making condoms widely available. C. Tax breaks for large families. D. Raising the legal age of marriage. E. Free birth control pills.

25. City officials face an increasing population size. They decide to fill in wetlands upstream along a river that runs through the city. They build homes on the filled-in land. As a result, they must periodically deal with floods along the river that brings water into the city. This is an example of which of the following? A. Pronatalist policy B. Antinatalist policy C. Habitat destruction D. Pollution E. Ecological stress

26. Which of the following describes individuals leaving a population? A. Birth rate B. Carrying capacity C. Immigration D. Emigration E. Environmental resistance

27. A population has a growth rate of 5 percent per year, how long will it take for this population to double? A. 70 years B. 50 years C. 14 years D. 6 years E. 5 years

28. An age-structure pyramid is used to: A. Study the immigration rates in a population B. Calculate the doubling time of a population C. Study the carrying capacity of a habitat D. Determine what the density-dependent factors are for a population E. Study the number and ages of people in a country

29. Which of the following are exhibited by k-select organisms? I. Slow maturation II. Many small offspring III. Reproduction occurs late in life A. I only B. II only C. III only D. I and II only E. I and III only

30. When a population encounters environmental resistance it is most likely to: A. Continue its high growth rate B. Mutate to form and continue growing C. Slow down its growth rate D. Move to a higher growth rate E. Have no effect on the growth rate

31. A population s growth can best be calculated using which of the following? A. births + immigration deaths emigration B. immigration + emigration C. emigration + births D. births + emigration deaths + immigration E. immigration emigration

32. A population s growth can best be calculated using which of the following? A. births + immigration deaths emigration B. immigration + emigration C. emigration + births D. births + emigration deaths + immigration E. immigration emigration

33. According to the graph, in the year 2000 the less developed countries had a population that was how many times bigger than the developed countries? Population (billions) A. 12 times B. 8 times C. 5 times D. 1.5 times E. 0.5 times 12 11 10 9 8 7 6 5 4 3 2 1 0 Total Population Less developed countries More developed countries 1950 2000 2050 2100 Time (s)