NEET BIOLOGY

Detailed explanation-1: -Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.

Detailed explanation-2: -What are prokaryotes? Prokaryotes are microscopic organisms belonging to the domains Bacteria and Archaea, which are two out of the three major domains of life. (Eukarya, the third, contains all eukaryotes, including animals, plants, and fungi.)

Detailed explanation-3: -Bacteria and Archaea seem to have a lot in common at first. The organisms in these domains don’t have a nucleus and therefore are called prokaryotes, a combination of the Greek words ‘pro’ (before) and ‘karyon’ (nut or kernel). Just as the name implies, the domain Bacteria contains bacteria.

Detailed explanation-4: -Abstract. The archaebacteria are a group of prokaryotes which seem as distinct from the true bacteria (eubacteria) as they are from eukaryotes.

Detailed explanation-5: -Prokaryotic cells are believed to be the oldest cells on Earth. Thus, all bacteria are prokaryotic, but not all prokaryotes are bacteria. The other major group of prokaryotes is the blue green algae (also known as cyanobacteria).