Download ch 5-6 test and core

Tri 1 Biology Chapter 5 and 6 (core questions 1-14)
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1. Each of the following is a density-dependent limiting factor EXCEPT
a. competition.
c. crowding.
b. seasonal cycles.
d. disease.
2. Which of the following factors play a role in population growth rate?
a. immigration
c. emigration
b. death rate
d. All of the above
3. Use this graph to answer the following question:
Which area of the graph indicates the population has reached carrying capacity?
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a. 1
c. 2
b. 3
d. All of the above
4. Which of the following tells you population density?
a. the number of births per year
b. the number of frogs in a pond
c. the number of deaths per year
d. the number of bacteria per square millimeter
5. How can a diagram of a population’s age structure predict how it can grow?
a. It shows how many people are at reproductive ages.
b. It shows how many people will probably die within a few years.
c. It shows how many people are entering the population by birth.
d. all of the above
6. Use this graph to answer the following question
Which area of the graph shows exponential growth?
a. 1
c. 2
b. 3
d. Doesn’t show exponential growth
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7. A biotic or an abiotic resource in the environment that causes population size to decrease is a
a. carrying capacity.
c. limiting factor.
b. limiting nutrient.
d. growth factor.
8. The human population experienced exponential growth after
a. agriculture began.
c. the bubonic plague began.
b. plowing and irrigation began.
d. the Industrial Revolution began.
9. Which has become the most important source of environmental change on Earth?
a. climate
c. human activity
b. energy
d. conservation biology
10. Why are fossil fuels nonrenewable?
a. They require hundreds of millions of years to form.
b. Their ecosystems change forever when they are burned.
c. They are converted to carbon dioxide when they are burned.
d. They exist in a very small supply.
11. Using renewable resources while ensuring that they are not depleted is a practice called
a. sustainable development.
c. biological magnification.
b. monoculture.
d. subsistence hunting.
12. Human survival is tied to biodiversity because
a. humans love to look at beautiful things.
b. humans are part of the food webs and energy cycles that a great variety of organisms
share.
c. increased biodiversity makes humans vulnerable to extinction.
d. humans need a wide variety of animal species for hunting and wildlife products.
13. One of the greatest threats today to biological diversity is
a. old-growth forests.
c. habitat destruction.
b. ozone depletion.
d. monoculture.
14. An increase in Earth’s average temperature from the buildup of carbon dioxide and other gases in the
atmosphere is called
a. the greenhouse effect.
c. global warming.
b. ozone depletion.
d. particulate dispersal.
____ 15. There are 150 Saguaro cactus plants per square kilometer in a certain area of Arizona desert. To which
population characteristic does this information refer?
a. growth rate
c. age structure
b. geographic distribution
d. population density
____ 16. What does the range of a population tell you that density does not?
a. the number that live in an area
c. the births per unit area
b. the areas inhabited by a population
d. the deaths per unit area
____ 17. What is happening in a population as it decreases?
a. The birthrate and the death rate remain the same.
b. The death rate becomes lower than the birthrate.
c. The death rate stays the same and the birthrate increases.
d. The death rate becomes higher than the birthrate.
____ 18. If immigration and emigration numbers remain equal, which is the most important contributing factor to a
slowed growth rate?
a. increased birthrate
c. decreased birthrate
b. constant death rate
d. constant birthrate
____ 19. As resources in a population become less available, the population
a. declines rapidly.
c. reaches carrying capacity.
b. increases slowly.
d. enters a phase of exponential growth.
____ 20. When the exponential phase of a logistic growth curve of a population ceases,
a. the size of the population drops.
b. the size of the population stays the same.
c. population growth begins to slow down.
d. population growth begins to speed up.
____ 21. A limiting nutrient is to ecosystem productivity as a limiting factor is to population
a. birthrate.
c. growth rate.
b. density.
d. immigration.
____ 22. Which would be least likely to be affected by a density-dependent limiting factor?
a. a small, scattered population
b. a population with a high birthrate
c. a large, dense population
d. a population with a high immigration rate
____ 23. Countries in the first stage of demographic transition have
a. a low death rate and a high birthrate.
c. a slowly growing population.
b. a high death rate and a low birthrate.
d. more old people than young people.
____ 24. An environmental problem that resulted from the green revolution was
a. overpopulation.
c. starvation.
b. failed crops.
d. depleted water supplies.
____ 25. The sulfur and nitrogen compounds in smog combine with water to form
a. ozone.
c. acid rain.
b. ammonia.
d. chlorofluorocarbons.
____ 26. When erosion and other factors cause soil to lose its ability to hold water and other nutrients and to support
plant life, it is called
a. desertification.
c. deforestation.
b. depletion.
d. monoculture.
____ 27. Which of the following is NOT considered a sustainable-development strategy for management of Earth’s
resources?
a. contour plowing
c. aquaculture
b. desertification
d. drip irrigation
____ 28. Which is a way to limit deforestation?
a. use more wood products
c. increase carbon dioxide levels
b. plant and harvest trees on tree farms
d. fertilize the soil
____ 29. The number of different species in the biosphere is called
a. biodiversity.
c. genetic diversity.
b. ecosystem diversity.
d. species diversity.
____ 30. Biodiversity is important to human society because it
a. is a natural resource.
c. provides medicines.
b. provides food and goods.
d. all of the above
____ 31. Human well-being is tied to biodiversity because
a. humans love to look at beautiful things.
b. humans are part of the food webs and energy cycles that a great variety of organisms
share.
c. less biodiversity makes humans vulnerable to extinction.
d. humans need a wide variety of animal species for hunting and wildlife products.
____ 32. One property that makes DDT hazardous over the long run is that DDT is
a. an insecticide.
c. nonbiodegradable.
b. a perfect pesticide.
d. deadly to herbivores.
____ 33. All of the following are threats to biodiversity EXCEPT
a. biological magnification of toxic compounds.
b. habitat fragmentation.
c. invasive species.
d. species preservation.
____ 34. As DDT moves up the trophic levels in food chains, or food webs, its concentration
a. stays the same.
c. decreases.
b. increases.
d. is eliminated.
____ 35. An ecological “hot spot” is an area where
a. habitats and species are healthy.
b. hunting is encouraged.
c. habitats and species are in the most danger of extinction.
d. species diversity is too high.
____ 36. Overexposure to UV radiation can
a. cause cancer.
b. decrease organisms’ resistance to disease.
c. damage eyes.
d. all of the above
____ 37. Some scientists think that global warming may be
a. a natural variation in climate.
c. melting the polar ice caps.
b. a result of human activities.
d. all of the above
____ 38. The major cause of ozone depletion is
a. nitric acid.
c. chlorofluorocarbons.
b. sulfuric acid.
d. ultraviolet light.
____ 39. What would be the most likely effect of an increase in the use of CFCs?
a. The ozone layer would suddenly disappear.
b. The ozone holes would get smaller.
c. The ozone holes would get larger.
d. There would be no effect on ozone in the atmosphere.
Essay
38-40. Explain any one of the following . Include pictures, source, how it works, extent of the problem, chemistry if
possible, and prevention.
Greenhouse effect,
Ozone depletion,
Pesticide poisoning,
Deforestation,
Desertification,
Tropical Rainforest depletion and soil infertility,
Biomagnification
Starvation, malnutrition, lack of food and clean water