Tag: useful and harmful microbes

Questions Related to useful and harmful microbes

Which saprotroph is similar in appearance to the Mucor?

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

  1. Penicillium

  2. Neurospora

  3. Rhizopus

  4. None of the above

Show answer
Correct Option: C
Explanation:

Mucor and Rhizopus are fungi belonging to the family Mucoraceae. Mucor is called as pin mould. Rhizopus is known as black mould. They are saprophytic fungi that grow on dead and decaying organic material. The fungal mycelium of Mucor and Rhizopus look like fine cottony threads on the surface of the bread. Thus the correct answer is option C.

Failure of gamentangial fusion in Rhizopus forms _______.

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

  1. Zygote

  2. Zygospore

  3. Parthenospore

  4. Oidia

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Correct Option: C

Which form of sexual reproduction can be related to Mucor?

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

  1. Isogamy

  2. Anisogamy

  3. Oogamy

  4. All of the above

Show answer
Correct Option: A
Explanation:

Reproduction in Mucor takes place by isogametes. Mucor reproduces both in the sexual and asexual methods. While asexual reproduction takes place by the formation of spores, sexual reproduction takes place by conjugation of isogamy. 

Hence the correct option is A.

Fungus Rhizopus resembles moss in having _______.

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

  1. Hyphae

  2. Mycelium

  3. Spores

  4. Archegonia

Show answer
Correct Option: C
Explanation:
Rhizopus is a fungus, therefore, non chlorophyllous. It has a saprophytic mode of nutrition. The organism is made of mycelium and produces spores for sexual reproduction.
Moss - Funaria is a Bryophyte, therefore, chlorophyllous, mode of nutrition being autotrophic (photosynthetic). It also produces spores as a result of sexual reproduction.
So, the correct answer is 'Spores'

Black colour of Bread Mould is due to :

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

  1. Zygospore

  2. Colour of hyphae

  3. Decaying organic matter

  4. Sporangia

Show answer
Correct Option: D

Claviceps purpurea grows as parasite :

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

  1. In human gut

  2. In sugarcane roots

  3. One pine needles

  4. On fruits of grasses

Show answer
Correct Option: D
Explanation:

Claviceps purpurea is a fungus that under natural conditions infects rye and triticale and many grasses.

So, the correct answer is 'On fruits of grasses'

St. Anthony's fire disease is caused by :

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

  1. Bacteria

  2. Fungus

  3. Nematode

  4. Polychaete

Show answer
Correct Option: B
Explanation:

Ergotism is the effect of long-term ergot poisoning, traditionally due to the ingestion of the alkaloids produced by the Claviceps purpurea fungus that infects rye and other cereals, and more recently by the action of a number of ergoline-based drugs.

So, the correct answer is 'Fungus'

Heterothallism is found in :

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

  1. Mucor

  2. Cycas

  3. Selaginella

  4. Volvox

Show answer
Correct Option: A
Explanation:

Heterothallic fungi have sexes that reside in different individuals. The term is applied particularly to distinguish heterothallic fungi, which require two compatible partners to produce sexual spores. Mucor is a heterothallic fungi.

So the correct option is A.

Zygospore of Mucor is :

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

  1. Haploid

  2. Thick-wall resting spore

  3. Asexual spore

  4. Spore that germinates to form zoospores

Show answer
Correct Option: B
Explanation:

The zygospore of Mucor is covered by a thick wall and is a resting spore which means it undergoes a resting period, to avoid unfavorable environmental conditions

So, the correct answer is 'Thick-wall resting spore'

In Mucor, zygospore germinates through the formation of :

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

  1. Meiospores

  2. Mitospores

  3. Zoospores

  4. Planospores

Show answer
Correct Option: A
Explanation:

In mucor each meiospore, after liberation, germinates like sporangiospore and forms a new mycelium like the mother thallus.

So the correct option is A.