Which organism has more biomass, the Fox or the Rabbit? __ Which organism has more available energy, the Grass or the Fox? __ Which organism contains more individuals, the Zooplankton or the Phytoplankton? __

Which organism has more biomass, the Fox or the Rabbit?<br />__**Rabbit**__<br />Rabbits, as primary consumers, have a greater biomass than foxes, which are secondary consumers. This is due to the loss of energy as you move up the trophic levels. Less energy means fewer individuals can be supported at higher trophic levels, resulting in less biomass.<br /><br />Which organism has more available energy, the Grass or the Fox?<br />__**Grass**__<br />Grass, as a producer, has the most available energy. It captures energy from the sun through photosynthesis. As you move up the food chain (grass -> rabbit -> fox), energy is lost as heat and used for life processes. Therefore, the fox has the least available energy.<br /><br />Which organism contains more individuals, the Zooplankton or the Phytoplankton?<br />__**Phytoplankton**__<br />Similar to the grass/rabbit/fox example, phytoplankton are the producers in aquatic ecosystems, and zooplankton are the primary consumers. Because energy is lost as you move up the food chain, there are generally more phytoplankton (more individuals and greater biomass) than zooplankton.<br />