객관식
Which of the following best explains why the Sahara Desert is unable to support large populations of grazing herbivores?
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48. Ecology
Introduction to Ecology
객관식
In an ecosystem, the energy that reaches tertiary consumers ultimately originates from which of the following sources?
A
Decomposers
B
The Sun
C
Atmospheric nitrogen
D
Geothermal vents
검증된 단계별 안내1
Step 1: Begin by understanding the flow of energy in an ecosystem. Energy originates from the Sun and is captured by primary producers (plants, algae, and photosynthetic organisms) through the process of photosynthesis.
Step 2: Primary producers convert solar energy into chemical energy stored in glucose and other organic molecules. This energy is then passed on to primary consumers (herbivores) when they feed on the producers.
Step 3: Secondary consumers (carnivores or omnivores) obtain energy by consuming primary consumers, and tertiary consumers (top predators) acquire energy by feeding on secondary consumers.
Step 4: Decomposers play a role in recycling nutrients but do not serve as the primary source of energy for tertiary consumers. Similarly, atmospheric nitrogen and geothermal vents are not direct sources of energy for the food chain.
Step 5: Conclude that the energy reaching tertiary consumers ultimately originates from the Sun, as it is the primary source of energy driving the entire ecosystem.
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