Biology · Relationships of organisms with one another and with the environment. The idea in plain words, the rules to remember, the mistake to avoid and a worked example, written and checked by Mega Lecture.
The Sun is the main source of energy for living things. Producers (plants) use light energy in photosynthesis to make their own organic nutrients. Almost all other organisms get their energy by eating producers or by eating animals that ate producers. That is why life depends on photosynthesis.
A food chain shows the transfer of energy from one organism to the next. The arrow means "is eaten by" and points the way the energy goes. A food web is a network of linked food chains.
Each feeding stage is a trophic level. Only a small part of the energy passes to the next level. The rest is transferred to the environment, mostly as heat from respiration.
Students draw the arrows from the eater to the food. The arrow always points from the organism that is eaten to the organism that eats it, the direction of energy flow.
Answer: 10% (600 kJ) is available to the secondary consumers.
Type what you are stuck on. The helper finds the explanation, worked examples and the notes to read, free and instant.