EVERYDAY SCIENCE

Detailed explanation-1: -Bacteria are single celled microbes that lack a nucleus. Archaea are like bacteria, but they have different structures and properties. This gives them the ability to live in extreme environmental conditions. Protozoa are unicellular microorganisms that have nuclei.

Detailed explanation-2: -Bacteria are single-celled organisms with a unique internal structure. Humans and other multicellular organisms are eukaryotes, which means our cells have distinct nuclei bound with a membrane. Bacteria are prokaryotes, meaning they don’t have organized nuclei or any other membrane-bound organelles.

Detailed explanation-3: -Single-celled organisms are called unicellular organisms. All prokaryotic organisms such as Bacteria, Archaea are unicellular.

Detailed explanation-4: -Prokaryotes. Prokaryotes are unicellular organisms without a true nucleus. They are very small in size from 0.1 to 5.0 µm.