B. A small fraction of the energy is transferred to higher trophic levels, majority stays in the lower trophic levels
Energy transfer between trophic levels is insufficient. When an organism is eaten by another organism, not all of the biomass of prey forms the biomass of the predator. Majority of the energy is released into environment during cellular respiration. Some of the matter also remains undigested and is not used by the predator. Thus, only 10% of energy available at one level is transferred to the next level. So when we keep on moving up in a food chain, energy available keeps on decreasing.
Pollution from a single, identifiable source is called
point source pollution.
The things that we use for the production of anything releases some wastes products that act as a pollutant to the environment. these are classified into two main category such as Point source and non point source pollution. In non point source pollution the cause for the pollution is from many places and it is very tedious to find the source of the pollution.
When a pollution occurs from a single and also an identifiable place or source then it is called as Point source pollution. Some of the examples of point source pollution includes, Factories, power plants, Municipal wastewater treatment plants,etc.
This is because secondary endosymbiosis occurs when one living cell engulfs another cell that has undergone primary endosymbiosis. It means that there are now more membranes layers, one from the engulfed cell/organism and the other from the engulfed bateria/cell during the primary endosymbiosis.
This major species of protist undergo endosymbiosis, where one cell engulfs another such that the engulfed cell survives and both cells benefit i.e it allowed the engulfed cell to conduct photosynthesis through the presence of chloroplast.