I need help!!!! If you have something negative to say simply don't answer!?

1. A complex of interconnected food chains in an ecosystem is called a/an

A. ecological pyramid.

B. food web.

C. trophic stack.

D. ecosystem.

2. Which of the following examples of an ecological study involves the ecosystem level of organization?

A. The effects of a disease on population size

B. The effects of competition on survival

C. The effects of an invasive plant species on bird nesting sites

D. The effects of human activities on biogeochemical cycling

3. The nitrogen utilized by most plants is derived from

A. soil.

B. decayed organic matter.

C. the atmosphere.

D. nitrogen gas.

4. The most common cause of desertification is

A. overgrazing.

B. the construction of dams.

C. drought.

D. mining.

5. Which of the following doesn't describe an MDC?

A. It's highly industrialized.

B. It generally experiences replacement reproduction.

C. It has undergone the demographic transition.

D. Its age structure diagram resembles a pyramid.

6. The life history pattern in which population growth is logistic is called

A. equilibrium pattern.

B. biotic potential.

C. opportunistic pattern.

D. population density.

7. Study the following food chain: grass → snakes → rabbits → hawks. From this chain, you can correctly assume that each population

A. is always larger than the one before it.

B. supports the next trophic level.

C. is a carnivore.

D. is a species of herbivore.

8. Among human populations, the primary use of fresh water is for

A. energy.

B. flushing toilets.

C. drinking and cooking.

D. agriculture and industry.

9. Which of the following factors will have a greater impact on a population as the density of that population increases?

A. Predation

B. Climate

C. Weather

D. Natural disaster

10. Which one of the following conditions is an example of resource partitioning?

A. Two species of mice—one that eats seeds and the other that eats insects

B. Two species of squirrels—one that eats acorns from the branches and one that eats acorns that have fallen to the ground

C. Two species of birds that eat fruit from the same tree

D. A species of butterfly and a species of bee that pollinate the same flower

11. If the birthrate is 10 per 1,000 and the death rate is 10 per 1,000, then the growth rate is

A. 100%.

B. 20%.

C. 10%

D. 0%.

12. Which of the following is a renewable resource?

A. Land

B. Minerals

C. Wind

D. Fossil fuels

13. Which one of the following pollutants is responsible for the increase in skin cancer?

A. Nitric oxide

B. Chlorofluorocarbons

C. Chlorine monoxide from automobiles

D. Polychlorinated hydrocarbons

14. Which of the following was one result of the Green Revolution?

A. An increased reliance on polyculture agriculture

B. An increase in the yield of crops for less-developed countries

C. The protection of species diversity

D. The conservation of topsoil

15. During exponential growth, the rate of growth

A. starts quickly and then levels off.

B. remains steady over time.

C. starts slowly and then accelerates.

D. declines consistently over time.

16. Which one of the following phrases describes many countries within Asia and Africa?

A. MDCs experiencing slow population growth

B. LDCs experiencing rapid population growth

C. MDCs experiencing rapid population growth

D. LDCs experiencing slow population growth

17. In which of the following relationships do both species benefit?

A. Parasitism

B. Mutualism

C. Competition

D. Commensalism

18. A source from which organisms generally take elements is called a/an

A. reservoir.

B. exchange pool.

C. biotic community.

D. food web.

19. Which one of the following interspecies relationships has a negative effect on both species?

A. Commensalism

B. Competition

C. Parasitism

D. Predation

20. The process of chemical cycling is known as a biogeochemical cycle because it

End of exam

A. absorbs the chemical involved from the sediment.

B. involves both living and nonliving components.

C. takes place over a long period of time.

D. withdraws the chemical from the atmosphere as a gas.

7 Answers

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  • 7 years ago
    Favorite Answer

    these are correct answers. The ones I did not answer are the ones I missed on my test. I have to retake the test in 30 days. Hope this helps.

    1. c

    2

    3

    4. a

    5. b.

    6. d.

    7 d.

    8.

    9. d.

    10 b

    11

    12. a

    13 b.

    14

    15 c

    16. d

    17

    18 b

    19 b

    20. b

  • 6 years ago

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    RE:

    I need help!!!! If you have something negative to say simply don't answer!?

    1. A complex of interconnected food chains in an ecosystem is called a/an

    A. ecological pyramid.

    B. food web.

    C. trophic stack.

    D. ecosystem.

    2. Which of the following examples of an ecological study involves the ecosystem level of organization?

    A. The effects of a disease on population size

    B....

    Source(s): negative simply don 39 answer: https://biturl.im/VcQzJ
  • 7 years ago

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  • 6 years ago

    thats tough talk on yahoo answers lmao

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    Lv 4
    5 years ago

    p

  • Anonymous
    7 years ago

    I'M SRRY BUT U R WRONG THANKS FOR TRYING

  • 6 years ago

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