Tag: botany

Questions Related to botany

Lichen with a branched system but small base is :

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

  1. Fruticose

  2. Foliose

  3. Crustose

  4. Symbiont

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Correct Option: A
Explanation:

Lichens with a branched system but small base are Fruticose.


Lichens are a complex life form of a symbiotic partnership of two separate organisms, a fungus, and algae. The dominant among then is a fungus. The algae can be either green algae or cyanobacteria or both fungus. 

These are $3$ main types of lichens. Foliose, Fructose, and Crustose. Foliose lichens have $2$ easily distinguishable sides, top, and bottom. Fruticose lichens have round branches that have a central core and others are hollow in the middle. 

Reindeer Moss is :

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

  1. Lichen

  2. Fungus

  3. Bryophyte

  4. Cnidarian

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Correct Option: A
Explanation:

Reindeer moss is lichen that is a fruticose lichen found in great abundance in Arctic lands. It is an erect, many branched plant that grows up to 8 cm hight covers immense areas and serves as pasture for reindeer, moose, caribou, and musk oxen.

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

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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.