Tag: lichens

Questions Related to lichens

Cladonia rangiferina is,

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Lichen

  2. Alga

  3. Fungus

  4. Angiosperm

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Correct Option: A
Explanation:
It is a light-colored, fruticose lichen belonging to the Cladoniaceae family. Its commonly called as reindeer lichen.
So, the correct answer is 'Lichen'

A harmful lichen is 

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Umbilicaria

  2. Letharia

  3. Usnea

  4. Cladonia

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Correct Option: B

Structure helping lichens in respiration is 

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Isidium

  2. Soredium

  3. Cephalodium

  4. Cyphella

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Correct Option: D

Select the correct match :

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Phytoplankton - Protozoa

  2. Symbiosis - Lichen

  3. Holozoic nutrition - Fungi

  4. Autotrophs - Monerans

Show answer
Correct Option: B
Explanation:

Symbiosis in lichen is the mutually helpful symbiotic relationship of green algae living among the filaments of a fungus, forming a lichen. Example, Usnea

So, the correct answer is 'Symbiosis - Lichen'

Majority of lichens are made of

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Blue-green algae and basidiomycetes

  2. Blue-green algae and ascomycetes

  3. Red algae and ascomycetes

  4. Brown algae and higher plants

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Correct Option: B

Symbiotic association of fungi and algae is

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Lichen

  2. Mycorrhiza

  3. Mycoplasma

  4. Both A and B

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Correct Option: A
Explanation:

A lichen is a long living composite organism that arises from green algae or cyanobacteria  living among filaments of a fungus in a mutually beneficial relationship (symbiotic relationship). The algal component of a lichen is known as phycobiont and the fungal component is called mycobiont.

Example, Usnea
So, the correct answer is 'Lichen'

Short twisted strands of hyphae which serve as anchors for lichens are :

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Rhizines

  2. Rhizoids

  3. Mycelium

  4. Roots

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Correct Option: A
Explanation:

In lichens, rhizines are multicellular root-like structures, arising mostly from the lower surface.Rhizines serve only to anchor the lichen to their substrate; they do not absorb nutrients as do plant roots.

So the correct option is A.

Lichen growing on wood is called :

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Corticolous

  2. Lignocolous

  3. Terricolous

  4. Saxicolous

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Correct Option: B
Explanation:
  • In biology that lives in dead wood, leaves, or sticks, or organic debris is called as lignicolous. 
  • Lichens which grow on wood are called lignicolous, e.g., Cephalium.
  • Hence the correct answer is option B. 

Lichen are composite organisms consisting of an alga and 

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Moss

  2. Fungus

  3. Protozoa

  4. Bacteria

Show answer
Correct Option: B
Explanation:
Lichens are symbiotic associations between an algal component (phycobiont) and fungal component (mycobiont)
So, the correct answer is 'Fungus'

Sexual reproduction in lichen thallus belongs to :

botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

  1. Algal component only

  2. Fungal component only

  3. Both algal and fungal components

  4. Not understood yet

Show answer
Correct Option: B
Explanation:
Sexual reproduction in Lichen thallus belongs to Fungi, and belong to Basidiomycetes or Ascomycetes
So, the correct answer is 'Fungal component only'