Energy Flow and Ecological Pyramids

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. In an aquatic ecosystem, the trophic level equivalent to cows in a grassland is

Phytoplankton

Nekton

Zooplankton

Benthos

Your comments:

Question 1 of 20

2. The statement ‘Tiger is the apex of the food chain’ indicates:

Tiger is dependent upon a large number of herbivores and even large number of trees.

Tiger is a carnivore.

Tiger has many enemies.

Tiger has maximum biomass.

Your comments:

Question 2 of 20

3. Ecosystem creates

Food chains

Food web

Both of these

Only food chain

Your comments:

Question 3 of 20

4. Most food chains are composed of how many trophic levels?

3 or 4

More than 16

9 or 10

1 or 2

Your comments:

Question 4 of 20

5. An inverted pyramid of numbers and an inverted pyramid of biomass are respectively seen in

Tree and sea ecosystems

Sea and grassland ecosystems

Grassland and tree ecosystems

Sea and tree ecosystems

Your comments:

Question 5 of 20

6. The loss of energy as one proceeds from one trophic level to the next trophic level is approximately

90%

60%

40%

30%

Your comments:

Question 6 of 20

7. Which of the following pyramid of numbers is not upright?

Forest ecosystem

Tree ecosystem

Pond ecosystem

Desert ecosystem

Your comments:

Question 7 of 20

8. In a pyramid of numbers, in a grassland ecosystem, the largest population is that of

Tertiary consumers

Secondary consumers

Primary consumers

Producers

Your comments:

Question 8 of 20

9. The pyramid of energy in an aquatic ecosystem is

Always upright

Always inverted

Bell-shaped

None of the above

Your comments:

Question 9 of 20

10. When the number of organisms at successive levels is plotted, they assume the shape of a pyramid. This is called the pyramid of

Biomass

Number

Energy

None of the above

Your comments:

Question 10 of 20

11. Approximately what amount of energy is available to one trophic level from one trophic level lower to it?

20%

1%

10%

30%

Your comments:

Question 11 of 20

12. Which types of the following pyramids are never inverted?

Pyramid of dry biomass

Pyramid of biomass

Pyramid of energy

Pyramid of numbers

Your comments:

Question 12 of 20

13. Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?

It is upright in shape.

Its base is broad.

It shows energy content of different trophic levels.

It is inverted in shape.

Your comments:

Question 13 of 20

14. In a food chain, the total amount of living material is depicted by

Pyramid of biomass

Trophic levels

Pyramid of numbers

Pyramid of energy

Your comments:

Question 14 of 20

15. This is an inverted pyramid:

Pyramid of biomass in a pond ecosystem

Pyramid of biomass in a grassland

Pyramid of energy in a pond ecosystem

Pyramid of numbers in a grassland

Your comments:

Question 15 of 20

16. Changes in the body form of some planktonic animals with seasonal changes in temperature are called:

Metamorphosis

Cyclomorphosis

Heteromorphosis

Anamorphosis

Your comments:

Question 16 of 20

17. An inverted pyramid is found in

Biomass pyramid of a grassland

Biomass pyramid of an aquatic system

Energy pyramid of a grassland

Pyramid of numbers of an aquatic system

Your comments:

Question 17 of 20

18. The ‘10 Percent Law’ is related to

Energy transfer from a lower trophic level to a higher trophic level

Mendelian genetics

Energy consumption during photosynthesis in C4 plants

Non-Mendelian genetics

Your comments:

Question 18 of 20

19. During the food chain, the maximum energy is stored in

Decomposers

Herbivores

Producers

Carnivores

Your comments:

Question 19 of 20

20. The sequence of species through which the organic molecules in a community process is

Population

Ecological pyramid

Food chain

Ecosystem

Your comments:

Question 20 of 20

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