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: -Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide.

Detailed explanation-3: -Specifically, mature red blood cells and cornified cells in the skin, hair, and nails contain no nucleus.

Detailed explanation-4: -The most straight-forward answer would be that they do not need one. This article suggests that the evolution of the nuclear membrane allowed the separation of the processes of translation from transcription. This allowed greater control of these two key cell functions.

Detailed explanation-5: -These cells do not have membrane-bound cell organelles such as Golgi bodies, mitochondria, lysosomes, ER, peroxisomes, etc. Prokaryotes do not have a nucleus, so hence do not have a nucleolus.