About Ecology

Following are some of the multiple choice questions on the Ecology with answers that will help the students in developing their knowledge.

Ecology MCQ

1. Which is an example of where primary succession could occur?

  • a glacier melts and exposes new rocks
  • natural fire burns a prairie
  • a corn field is abandoned and left to overgrow
  • flood covers a piece of land

2. Which biome, because of its climate and amount of rainfall, has the largest number of species of plants and animals?

  • Tundra
  • Rainforest
  • Desert
  • Pineforest

3. This Age Structure Diagram indicates _______

  • Rapid Growth
  • Slowing Growth
  • Zero Growth
  • Negative Growth

4. All these organisms share the same

  • Biome
  • Population
  • Community
  • Habitat

5. At what stage does this population reach it's carrying capacity on the Demographic Transition Model

  • 1
  • 2
  • 3
  • 4

6. The population at Stage 1 is likely in ______

  • Pre-Industrialization 
  • Post-Industrialization 
  • Industrialization
  • Exponential Growth

7. When a plant uptakes water and transpires it to the atmosphere, this is known as _______

  • Condensation
  • Evapotranspiration
  • Infiltration
  • Aquifer

8. Most of our limited fresh water supply is stored in ____

  • The Great Lakes
  • Aquifers
  • The Atmosphere
  • Glacial Ice

9. Bacteria which convert nitrogen gas into bio-available forms of nitrogen, such as ammonia and nitrate, are known as _____

  • De-nitrification bacteria 
  • Nitrogen fixing bacteria
  • Oxidizers
  • Buffers

10. In which reservoir is carbon stored the shortest period of time ______

  • Limestone rocks
  • The ocean
  • The atmosphere
  • Coal

11. Phosphorus is an essential nutrient for plants and animals because it is use to make _______

  • Carbohydrates
  • Glucose
  • RNA / DNA
  • Starches

12. Which of these is not a characteristic share by all living things

  • Growth and Development
  • Reproduction
  • Movement
  • Homeostatis 

13. Fungi are a  ________

  • Autotrophs
  • Heterotroopers
  • Decomposers
  • Primary Consumers

14. Which these organism below is a primary consumer?

  • Fungi
  • Snake
  • Ladybug
  • Blue Jay

15. The image shown is an example of _______ 

  • Parasitism  
  • Commensalism 
  • Mutualism 
  • Communism 

16. An important attribute of a K-strategist species is _____

  • Nurture their young
  • Exponential Growth
  • Opportunistic
  • Relatively low body mass

17. In the food chain below if the worm contains 6 calories of energy, how much energy is available to the turtle to grow, develop, and reproduce if it ingest 10 worms?

  • 0.06
  • 0.6
  • 6
  • 60

18. Approximately 90 percent of energy iconsumed by an organism is lost to ___ 

  • Growth
  • Inefficiencies in its metabolism 
  • Repairing cells
  • Carbon dioxide

19. Which is not a biome found in North America?

  • Mojave Desert
  • Grasslands of the Great Plains
  • Everglades / Coastal Plain
  • Tropical Rain Forest 

20. An underground reservoir of water is known as ______

  • An Estuary 
  • An Aquifer
  • Sublimation 
  • Permafrost

21. Soil and sediments is created by the physical and chemical ____________ of igneous rock. 

  • Destabilization 
  • Expansion
  • Weathering 
  • Sublimation 

22. In the Article "The Critical Link", breaking down barriers that deny women access to health care, family planning, education, land ownership, employment and credit is linked to ________

  • Higher Mortality Rate
  • Higher Fertility Rate
  • Lower Fertility Rate
  • Lower Mortality Rate

23. The nonliving aspects of an ecosystem.

  • Abiotic factors
  • Biotic factors

24. A collection of organisms that belong to different populations but all live in the same area and interact with one another.

  • Population
  • Ecosystem
  • Community
  • Ecosphere

25. Evaporation of water from the leaves of a plant gives of purified water to be evaporated.

  • precipitation
  • concentration
  • transpiration
  • evaporation

26. Individuals that can breed with one another make up a

  • species
  • population
  • community
  • ecosystem

27. The air we breathe is only ____% oxygen.

  • 10
  • 21
  • 78
  • 90

28. Organisms that obtains its energy from abiotic sources, such as sunlight or inorganic chemicals

  • Autotroph
  • Heterotroph
  • Omnivore
  • Carnivore

29. A bee receives nectar from a flower and carries the pollen to other flowers:

  • predation
  • parasitism
  • mutualism
  • commensalism

30. Mistletoe grows and spreads on trees, taking their nutrients:

  • predation
  • parasitism
  • mutualism
  • commensalism

31. What would happen within a few months after the formation of a volcanic island?

  • pioneer species would grow
  • no pioneer species would grow
  • trees and large plants would grow
  • rich, organic soil would be present

32. What would be a good example of a primary consumer?

  • carnivore
  • detrivore
  • decomposer
  • herbivore

33. Which organisms would be at the top or last trophic level?

  • plant
  • herbivore
  • omnivore
  • carnivore

34. The monkey would be a

  • decomposer
  • producer
  • primary consumer
  • secondary consumer

35. Introduced species disrupt ecosystems because they are a/an

  • Keystone Species
  • Endemic Species
  • Invasive Species
  • Native Species

36. The image provided is an example of a(n):

  • Carnivore
  • Herbivore
  • Producer
  • Autotroph

37. What Biome is covered in a dense canopy and an understory?

  • Tropical Rain Forest
  • Desert
  • Tundra
  • Tropical Savanna

38. What Biome is very dry; receives very little rainfall?

  • Tropical Rain Forest
  • Desert
  • Tundra
  • Tropical Savanna

39. What does every food chain start with? (Even if it's not drawn or written there!)

  • producers
  • sun
  • consumer
  • decomposers

40. An organism that needs to eat other organisms to obtain energy is known as a:

  • Autotroph
  • Producer
  • Consumer
  • Mutualist

41. Relationship in which two species live closely together

  • resource
  • mutualism
  • succession
  • symbiosis

42. The rabbit in this food web would be considered a:

  • Decomposer
  • Producer
  • Secondary Consumer
  • Primary Consumer

43. In this Food Web Pyramid Which type of consumer gets only 10% of the energy stored in plants?

  • Herbivore
  • Carnivore
  • Omnivore
  • Secondary Consumer

44. Which one is not a consumer?

  • anemone 
  • bear
  • shark
  • vulture

45. A graphic illustration that shows each trophic level and the amount of useable energy contained within.

  • Food chain
  • Food web
  • Energy Pyramid
  • All of these

46. What are the Abiotic factors in this image? 

  • water, sunlight, dirt, air
  • birds and plants
  • birds, water, dirt
  • plants, water

47.  plants that convert energy from the sun

  • decomposer
  • primary consumer
  • secondary consumer
  • producer

48. As you move upward, from level to level, in an energy pyramid, energy _____.

  • increases
  • decreases
  • stays the same
  • increases exponentially

49. A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

  • Population
  • Community
  • Habitat
  • Ecosystem

50. An illustration that uses arrows to show the MANY possible directions in which matter and energy can pass through the organisms in an ecosystem.

  • Food chain
  • Food web
  • Energy Pyramid
  • Succession Map

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