Question

Which of the following group is not comprised of sac fungi
A) Yeast
B) Truffles
C) Mushrooms
D) Morels

Answer 1

Hint: Sac fungi are a monophyletic group of fungi which are also known as ascomycetes and are representative of approximately 75% of all accounted fungi. Ascomycetes belong to the phylum of kingdom fungi and also the largest phylum of fungi.

Complete answer:
Let us study the options to find the correct answer:
Option A: yeast is single-celled as well as a eukaryotic microorganism which is classified as a member of the fungus kingdom, hundreds of millions of years ago first yeast was originated, and till now 1500 species are recognized currently and different species of yeast are an example of sac fungi. Therefore, this is an incorrect answer.

Option B: truffle is also a species of fungus and it is a fruiting body of subterranean ascomycete and also belongs to the species of genus tuber. Classification of truffle includes many other genera of fungi such as peziza, geopora, choiromyces, and hundreds others so the truffle also comprises sac fungi. Therefore, this is an incorrect answer.

Option C: mushroom is a fleshy and spore-bearing fruiting body that also belongs to the kingdom fungi but is a species of Basidiomycota and not of Ascomycota. It is also known as toadstool and does not contain sac fungi; therefore, this is the correct answer.

Option D: morels are the Morchella, the true morels and it is related to anatomically simple cup fungi as it belongs to the genus of edible sac fungi. These distinctive fungi have the appearance of honeycomb and as it also comprises sac fungi. Therefore, this is an incorrect answer.

Thus, option (C) Mushrooms is the correct answer.

Note: In the kingdom fungi, Ascomycota is a division that gets together with the Basidiomycota and forms the subkingdom dikarya and these are commonly known as sac fungi as it is the largest phylum with 64000 species.