NEET BIOLOGY

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: -Unicellular organisms include bacteria, protists, and yeast. For example, a paramecium is a slipper-shaped, unicellular organism found in pond water. It takes in food from the water and digests it in organelles known as food vacuoles.

Detailed explanation-3: -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.

Detailed explanation-4: -Bacteria and archaea are all unicellular prokaryotes. Eukaryotes do have cell nuclei and their structures are more complex. Yeasts and algae are examples of unicellular eukaryotes. Unlike prokaryote cells, eukaryote cells have organelles, cell organs fulfilling important functions in the cell.

Detailed explanation-5: -Classes of multicellular bacteria The most-studied members of this class are the cyanobacteria and the actinomycetes, but numerous other species from many phyla have been found to form filaments either conditionally or obligately [7].