Convergent evolution is the independent evolution of similar features in species of different lineages.
It creates analogous structures with similar form or function but these structures were not present in the last common ancestor of those groups.
The filamentous body forms of slime molds, water molds and the hyphae of fungi is considered a case of convergent evolution because the filaments shape is an adaptation for a nutritional mode as a decomposer.
It is because convergent evolution represents the independent evolution of similar features in species that don't have the same ancestor. In this case filamentous body forms evolved independently, but have the same function: an adaptation for a nutrition of decomposers.
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. ... The denser cold liquid or gas falls into the warm areas.
