All parts of land plants can be eaten by herbivores. Hence, all the energy travels up the food chain.

Q. All parts of land plants cannot be eaten by herbivores.

Q. In a food chain, plants are eaten by herbivores; herbivores are eaten by carnivores and so on. How much energy is passed on from one trophic level to another?

Q. Every part of plants cannot be eaten by herbivores.

Q. Consider the components of a food chain producers $\to$ herbivores $\to$ carnivores $\to$ top carnivores. Eventually what happens to all the energy passed from one element to the next?

Q. A plant is eaten by a herbivorous animal which, in turn, is eaten by a carnivorous animal. This chain is called: