Lower levels of organization in multicellular organisms are cells, tissues and organs. These are followed by organ system and finally organisms. These levels are absent in unicellular organisms as they have only one cell and therefore no tissue and further levels.
In multi-cellular organisms, all the cells may not be in direct contact with the surrounding environment. Thus, simple diffusion will not meet the requirements of all the cells.
In unicellular organisms, reproduction occurs by the division of the entire cell. The modes of reproduction in unicellular organisms can be fission, budding, etc. whereas in multicellular organisms, specialised reproductive organs...
Yes, the impact of removing all organisms in a trophic level will be different for different trophic levels. If all the producers are killed, it will cause death or migration...
Progressive increase in the concentration of non-biodegradable substances in a food chain is called biological magnification.
The level of these harmful substances will go on increasing from one trophic level to...
Multicellular organisms are made up of millions and trillions of cells. All these cells perform specific functions. All the cells specialised for performing similar functions are grouped together as tissues...
Removal of all the organisms in a trophic level will cause the same type of disturbance in an ecosystem, i.e., killing of higher trophic level and explosion in population of...
In binary fission, first the division of nucleus occurs, which is followed by the appearance of a constriction in the cell membrane. The cell membrane grows inward, deepening the constriction...
