NEET BIOLOGY

Detailed explanation-1: -Eukaryotes are organisms whose cells contain a nucleus and other membrane-bound organelles. There is a wide range of eukaryotic organisms, including all animals, plants, fungi, and protists, as well as most algae. Eukaryotes may be either single-celled or multicellular.

Detailed explanation-2: -Unicellular organisms can be prokaryotes or eukaryotes. Prokaryotes do not have cell nuclei: their structures are simple. Bacteria and archaea are all unicellular prokaryotes. Eukaryotes do have cell nuclei and their structures are more complex.

Detailed explanation-3: -The metabolic flux provided by the appearance of mitochondria allowed cells to grow larger, and their bacterial roots allowed them to form more complex structures. Eventually, these new organisms must have evolved the ability to reproduce themselves from a single cell.