Trophic Level

1. Energy transferred to the next trophic level is reduced to 10%. If human eats 100kg chicken, how much biomass can be transferred to the consuming human?

•    A. 1kg

•     B. 10 kg

•    C. 100 kg

•    D. 1000 kg

Organisms need food to sustain life. Which of the following is NOT good practice in feeding process in the ecosystem?

•    A. Raise animals and insects to fight other pests.

•    B. Dump organic wastes into rivers and streams.

•    C. Grow a variety of crops instead of only one crop.

•    D. Use organic fertilizers instead of chemical fertilizers.

3. Energy for the sun is needed by the plants to manufacture their own food. Which of the following explains why fruits and vegetables eaters are energy efficient?

•     A. They do not used energy at all.

•     B. They burn much of their energy in a day.

•     C. They directly derive energy from the producer level.

•     D. They get their energy from first degree consumer level.

4. Which statement does not describe the Law of Degradation of Energy?

•    A. Much of the energy from the food consumed is converted into heat.

•    B. Only 10% of energy is transferred to the consumer at any trophic level.

•    C. A lesser amount of energy is transferred from one trophic level to another.

• D. The same amount of energy is restored at the second trophic level as in the  first.

5. If there are 600 kg of biomass at the third trophic level, how much biomass  was available at the first trophic level?

•     A. 60 kg     

• B. 600 kg   

• C. 6,000kg

• D. 60,000kg

6. Which is NOT true about organisms at the highest trophic level in an energy pyramid?

•    A. They are apex consumers.

•    B. They can be meat and vegetable eater.

•    C. They get the least amount of energy.

•    D. They get the greatest amount of energy

What is the primary source of energy for most ecosystems?

• Sunlight
• Nuclear power
• Geothermal heat
• Wind energy

What happens to energy as it moves up the trophic levels?

• Energy increases as it moves up the trophic levels.
• Energy remains constant across trophic levels.
• Energy decreases as it moves up the trophic levels.
• Energy is completely transferred to the next level.

Which trophic level would a carnivore that eats herbivores belong to?

• Primary consumer
• Tertiary consumer
• Producer
• Secondary consumer

What role do decomposers play in the trophic levels?

• Decomposers only break down living plants.
• Decomposers recycle nutrients and support the base of the food web.
• Decomposers produce energy for primary consumers.
• Decomposers are at the top of the food chain.