Want this question answered?
three
3 (apex)
It depends. A food chain could be fairly long with about four or five steps in it, or a food chain could have just two.
What is the herbivore in the following food chain: algae → fish → herons?
Producers, consumers, and decomposers.
food chain
trophic levels.
A food chain runs off of different levels - each having one living organism in it, per food chain. The levels indicate a section where energy is used up by an organism - namely the one that attained the energy.
The tropical rainforest food chain has four levels. The four levels are the primary producers, the primary consumers, secondary consumers and the tertiary consumers.
energy pyramid or nutrient pyramid.
Calories
They are the third level of the food chain. The two levels that are before it is the producers and primary consumer.