A biomass pyramid shows the total mass of the organisms that each trophic level occupies in an ecosystem. Usually, producers have a higher biomass than any other trophic level, but there can be lower amounts of biomass at the bottom of the pyramid if the rate of primary production per unit biomass is very fast.
Vejetales
Carne
Pollo
Pescados
Pan (poco)
A, but may not be correct
Using a molecular<span>, scientists are able to estimate the amount of time that two species have been evolving independently.</span>lecular
