---

Question 1:

Which organisms convert sunlight energy into chemical energy through photosynthesis?

A) Producers
B) Consumers
C) Decomposers
D) Herbivores

Show Answer

Explanation: The correct answer is A) Producers. Producers, such as plants and algae, are able to convert sunlight energy into chemical energy through the process of photosynthesis. They are the primary source of energy in food chains and serve as the base for all other organisms in the ecosystem.

---

Question 2:

Which trophic level directly consumes producers?

A) Primary consumers
B) Secondary consumers
C) Tertiary consumers
D) Decomposers

Show Answer

Explanation: The correct answer is A) Primary consumers. Primary consumers, also known as herbivores, directly consume producers (plants or algae) as their source of energy. They are the first level of consumers in a food chain.

---

Question 3:

What percentage of energy is typically transferred from one trophic level to the next?

A) 10%
B) 25%
C) 50%
D) 75%

Show Answer

Explanation: The correct answer is A) 10%. Only about 10% of the energy available at one trophic level is typically transferred to the next trophic level. The remaining energy is lost as heat, used for metabolic processes, or excreted as waste. This energy loss contributes to the overall decrease in energy as we move up the food chain.

---

Question 4:

Which organisms break down organic matter and release nutrients back into the ecosystem?

A) Producers
B) Consumers
C) Decomposers
D) Herbivores

Show Answer

Explanation: The correct answer is C) Decomposers. Decomposers, such as bacteria and fungi, break down organic matter (dead plants and animals) and release nutrients back into the ecosystem. They play a crucial role in nutrient cycling, making the nutrients available for uptake by producers and restarting the energy flow in the food chain.

---

Question 5:

Which trophic level is at the top of the food chain?

A) Producers
B) Primary consumers
C) Secondary consumers
D) Tertiary consumers

Show Answer

Explanation: The correct answer is D) Tertiary consumers. Tertiary consumers are at the top of the food chain and are usually carnivores or top predators. They feed on secondary consumers, which in turn feed on primary consumers (herbivores), which ultimately consume producers. Tertiary consumers have fewer energy sources available to them compared to lower trophic levels.