Tag: classification of fungi

Questions Related to classification of fungi

Sporangiospores of Mucor are 

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Polyploid

  2. Triploid

  3. Diploid

  4. Haploid.

Show answer
Correct Option: D
Explanation:

Mucor mucedo reproduces asexually. When erect hyphal sporangiophores are formed. The tip of the sporangiophore swells to form a globose sporangium that contains uninucleate, haploid sporangiospores. 

So the correct option is D.

In Mucor, zygospore develops from :

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Promycelium

  2. Progametangium

  3. Gametangia

  4. Mycelium

Show answer
Correct Option: C
Explanation:

In mucor during sexual reproduction, compatible strains form short, specialized hyphae called gametangia. At the point where two complementary gametangia fuse, a thick-walled, spherical zygosporangium develops. The zygosporangium typically contains a single zygospore.

So the correct option is C.

Ergot of rye is caused by a species of:-

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Claviceps

  2. Phytophthora

  3. Uncinula

  4. Ustilago

Show answer
Correct Option: A
Explanation:
Claviceps purpurea is an ergot fungus of division Ascomycetes that grows on the ears of rye and related cereal and forage plants.
So, the correct answer is 'Claviceps'.

Which of the following pairs are correctly matched?
a. Wood rooting - Fomes
b. Coprophilus - peziza
c. Primary rock colonizers - Nidularia
Select the correct answer using the codes given.

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. $2$ and $3$

  2. $1$ and $3$

  3. $1$ and $2$

  4. $1, 2$ and $3$

Show answer
Correct Option: A

Identify the wrong statement.

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Haploid endosperm is typical feature of Gymnosperm

  2. Brown algae have chlorophyll a and c and fucoxanthin

  3. Archegonia are found in Bryophyta, pteridophyta and Gymnosperms.

  4. Mucor has biflagellate zoospores.

Show answer
Correct Option: D
Explanation:

Mucor is a microbial genus of molds commonly found in soil, digestive systems, plant surfaces etc. During sexual reproduction, compatible strains form short, specialized hyphae called gametangia. At the point where two gametangia fuse, a thick-walled, spherical zygosporangium develops. The zygosporangium typically contains a single zygospore.

So, the correct answer is 'Mucor has biflagellate zoospores'.

Ergotism is due to consumption of

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Contaminated water

  2. Rotting vegetables

  3. Contaminated grams

  4. Stale cooked food

Show answer
Correct Option: C
Explanation:

Ergotism is caused by Claviceps in cereal grains (rye) and is the oldest known mycotoxin. Mold in the feed replaces grain with a hard black mass called an ergot. Ergotism killed thousands in the middle ages  and it produces alkaloids. Toxins affect the nervous, vascular (vasoconstriction and resultant gangrene), and endocrine systems. Clinical signs include decreased food intake and growth; necrosis of beak, comb, and toes; distorted feather development; and enteritis. Ergotism primarily affects leghorns and other laying breeds and only trace amounts remain in the meat.

So the correct option is 'contaminated grams'.

Which of the following fungi consists chitosan in its cell wall?

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Penicillium

  2. Aspergillus

  3. Mucor

  4. None of the above

Show answer
Correct Option: C
Explanation:

Mucor is a saprotrophic fungus. The cell wall of the fungus contains considerable amounts of chitosan. Chitosan is a linear polysaccharide composed of randomly distributed β-(1→4)linked D glucosamine and N-acetyl glucosamine. It has commercial application in agriculture, biopesticide, and winemaking. Thus the correct answer is option C.

Which is wrong statement?

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Archegonia are found in bryophyta, pteridophyta and gymnosperms

  2. Mucer has biflagellate zoospores

  3. Haploid endosperm is typical feature of gymnosperms

  4. Brown algae have chlorophyll $(a)$, chlorophyll $(c)$ and fucoxanthin

Show answer
Correct Option: B
Explanation:

Mucor belongs to the class zygomycetes. The members of zygomycetes bear non-motile non-flagellated gametes.

So the correct option is B.

In Mucor conjugation produces

biology kingdom monera, protista and fungi mycorrhiza classification of fungi useful and harmful microbes

  1. Zoospore

  2. Zygospore

  3. Akinete

  4. Arthrospore.

Show answer
Correct Option: B
Explanation:

Sexual reproduction takes place during the unfavourable condition by means of gametangial copulation. The gametangia look alike and by conjugation, they give rise to zygospore.

So the correct option is B.