Question

What is meant by yeast? Give its examples.

Answer 1

Hint:Yeasts can be compared with moulds, which develop hyphae, with their single-celled growing conditions. Dimorphic fungi are considered fungal species and may take both kinds.

Complete answer:
First we should know about fungus to answer this question. Every member of the eukaryotic organism group containing microorganisms like yeasts and moulds, or the more common mushrooms, is a fungus. These species are known as a kingdom that is distinct from the other plant and animal kingdoms of eukaryotic life.
Yeast is eukaryotic microorganisms identified as members of its fungus kingdom that are single-celled. Yeasts are single-cell organisms that have developed from multicellular ancestors, with certain species possessing the ability to grow multicellular features by the development of related budding cell strings recognized as false hyphae or pseudohyphae. Depending on the species and climate, yeast sizes differ widely, usually measuring 3-4 μm, but some yeast can expand to 40 μm in diameter. By mitosis, most yeast replicates asexually, and often does so by the process of asymmetric separation recognized as budding. In a method known as fermentation, the yeast genus Saccharomyces cerevisiae transforms sugars to alcohols and carbon dioxide.
Examples- Saccharomyces cerevisiae, Histoplasma, Candida albicans, and Blastomyces.

Note: Hundreds of millions of years earlier, the first yeast emerged and yet at least 1,500 organisms are now recognized. They are expected to make up 1 percent of all fungal species described.