EVERYDAY SCIENCE

Detailed explanation-1: -Microorganisms can be unicellular (single cell), multicellular (cell colony), or acellular (lacking cells). They include bacteria, archaea, fungi, protozoa, algae, and viruses. Bacteria are single celled microbes that lack a nucleus. Archaea are like bacteria, but they have different structures and properties.

Detailed explanation-2: -Bacteria are not multicellular. They are unicellular organisms, possessing only one cell. All functions required to sustain life like growth, metabolism, reproduction, etc are carried out by a single cell in bacteria.

Detailed explanation-3: -False. Some fungi are multicellular. Example of a multicellular fungus is bread mould.

Detailed explanation-4: -Unicellular organisms can be prokaryotes or eukaryotes. Prokaryotes do not have cell nuclei: their structures are simple. Bacteria and archaea are all unicellular prokaryotes.

Detailed explanation-5: -Bacteria are unicellular microorganisms and thus are generally not organized into tissues. Each bacterium grows and divides independently of any other bacterium, although aggregates of bacteria, sometimes containing members of different species, are frequently found.