JAMB - Biology (2000 - No. 36)
In a food chain, each succeeding level in a forward direction represents
an increase in the number of individuals
a decrease in the number of individuals
an increase in the biomass of individuals
a gain in the total energy being transferred
ব্যাখ্যা
A food chain describes how energy and nutrients move through an ecosystem. At the basic level there are plants that produce the energy, then it moves up to higher-level organisms like herbivores. After that when carnivores eat the herbivores, energy is transferred from one to the other.