Tag: useful and harmful microbes

Questions Related to useful and harmful microbes

Mycorrhiza promotes plant growth by

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Absorbing inorganic ions from soil

  2. Serving as plant growth regulator

  3. Protecting plant from infection

  4. Helping plant in using atmospheric nitrogen

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Correct Option: A

Mycorrhiza generally occurs in :

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Alkaline soils

  2. Acidic soils

  3. Oligotrophic soils

  4. Eutrophic soils

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Correct Option: C
Explanation:

They prefer marshy environment and utilize dead and decaying material as food. Oligotrophic soil ( in between layers) have the above mentioned requirements in good quantities.Thus, the fungi prefer the oligotrophic soil for their survival

 So, the correct answer is 'Oligotrophic soils'

In endomycorrhiza, the fungus is generally _________.

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Ascomycetes

  2. Zygomycetes

  3. Basidiomycetes

  4. Deuteromycetes

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Correct Option: B

True symbiotic association between fungus and seed plant is

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Endomycorrhiza

  2. Ectomycorrhiza

  3. Helotism

  4. Commensalism

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Correct Option: B

In mycorrhiza, the fungal hyphae 

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Remain restricted to the root surface.

  2. Remain restricted upto the root cortex.

  3. Pass into the root interior.

  4. Enter the root apex and reach all parts.

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Correct Option: B

In mycorrhiza, the tips of fungal hyphae occur inside cortical cells in _______

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Ectomycorrhiza

  2. Endomycorrhiza

  3. Extomycorrhiza

  4. None of these

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Correct Option: B
Explanation:

The cortex is only one cell thick and these cells are packed with fungal hyphae. The nutrient exchange between the fungus and plant takes place at this interface and is extremely efficient

Ectomycorrhiza is found in

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Several trees and shrubs of tropical areas

  2. Many vascular plants of tropical area

  3. Several trees and shrubs of temperate areas

  4. Small vascular plants

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Correct Option: C

Fungal hyphae remain intercellular in

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Endomycorrhiza

  2. VAM

  3. Ectomycorrhiza

  4. Both A and B

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Correct Option: C

Plants growing in oligotrophic forest soils usually have

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Mycorrhiza

  2. Slow growth

  3. Reduced growth

  4. All of the above

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Correct Option: A

VAM is component of _________

botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

  1. Ectomycorhiza

  2. Endomycorhiza

  3. Green manure

  4. Mycoherbicides

Show answer
Correct Option: B
Explanation:

The ectomycorrhiza is an association that takes place at the surface of the roots whereas the endomycorrizal fungi penetrate into the root cortex and form arbuscules within the root cells.

Vesicular Arbuscular Mycorrhizal (VAM) is a fungus that penetrates the roots of a vascular plant and helps them to capture the nutrients from the soil. 
So, VAM is a component of endomycorhiza.