NEET BIOLOGY

Detailed explanation-1: -The biosphere’s earliest life-forms, called prokaryotes, survived without oxygen. Ancient prokaryotes included single-celled organisms such as bacteria and archaea.

Detailed explanation-2: -Anaerobic organisms are those that live an anoxic environment – one which lacks oxygen. While most living things require oxygen to survive – they’re aerobic – oxygen can actually be toxic to anaerobic organisms.

Detailed explanation-3: -Eukaryotic cells are cells containing membrane-bound organelles and are the basis for both unicellular and multicellular organisms. In contrast, prokaryotic cells do not have any membrane-bound organelles and are always part of unicellular organisms.

Detailed explanation-4: -All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles.

Detailed explanation-5: -A prokaryotic cell lacks a well developed nucleus. The nucleus does not has nuclear membrane. The cell also lacks cell organelles like Golgi bodies and endoplasmic reticulum.