The number of neutrons in each atom
A food chain can usually sustain no more than six energy transfers before all the energy is used up. And so less energy is transferred at each level of the food chain so the biomass gets smaller.
DNA<span> replicates </span>before<span> a </span>cell<span> divides to give a complete set of instructions to </span>each<span> daughter </span>cell<span>.</span>
Plants use photosynthesis to turn sunlight into energy (they use as food)
