Q.7. Which group has the largest biomass? a) Plankton b) Krill c) Leopard Seal d) Orca

The correct answer is a) Plankton.<br /><br />Plankton refers to the small and often microscopic organisms that drift in the water column of oceans, seas, and freshwater bodies. They form the base of the marine food web and are essential for the survival of many marine species. Plankton includes a wide range of organisms, such as phytoplankton (photosynthetic organisms like algae) and zooplankton (heterotrophic organisms like krill).<br /><br />Among the options provided, plankton has the largest biomass. Plankton populations are typically much more abundant than those of larger marine animals like krill, leopard seals, or orcas. The sheer number of plankton in the ocean contributes to their significant biomass, which supports the entire marine food web.