NEET BIOLOGY

Detailed explanation-1: -Organism. It is the lowest level of organization, which includes both unicellular and multicellular organisms. All the living species in this level exhibit all the characteristics required for the existence of life.

Detailed explanation-2: -Freshwater ecosystems are actually the smallest of the three major classes of ecosystems, accounting for just 1.8% of the total of the Earth’s surface.

Detailed explanation-3: -Within the discipline of ecology, researchers work at five broad levels, sometimes discretely and sometimes with overlap: organism, population, community, ecosystem, and biosphere.

Detailed explanation-4: -Biologists recognize 12 levels of organization in the living world. From the simplest to the most complex, these levels include atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, and finally biospheres.