Tag: botany

Questions Related to botany

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'

Phenomenon of halotism or controlled parasitism is shown by _______

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

  1. Leguminous roots

  2. Lichens

  3. Mycorrhiza

  4. All of the above

Show answer
Correct Option: B

Phycobiont and mycobiont together constitute :

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

  1. Phycomycetes

  2. Lichens

  3. Phycobilins

  4. Mycorrhiza

Show answer
Correct Option: B
Explanation:
Lichens are symbiotic association between alga and fungi. Phycobiont is algal partner and mycobiont is fungal partner. 
So, the correct answer is 'Lichens'

Lichens are composite organisms containing an alga and

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

  1. Fungus

  2. Bacterium

  3. Moss

  4. Protozoan

Show answer
Correct Option: A
Explanation:

Lichens are composite organisms containing algae and fungus. They live in symbiotic association. In this, algae provides food and nutrition obtained by photosynthesis. In turn, fungus provides protection, anchorage and absorption of water and nutrition from soil for algae.

Thus, the correct answer is option A.

Pick up the wrong statement.

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

  1. Lichens are symbiotic associations.

  2. Lichens do not grow in unpolluted areas.

  3. Lichens are very good pollution indicators.

  4. Algal component of lichen is known as phycobiont .

Show answer
Correct Option: B
Explanation:

  • Lichens are widely used as environmental indicators or bio-indicators. If the air is clean, shrubby, hairy and leafy, the lichens become abundant. 
  • Only a few lichen species can tolerate quite high levels of pollution.

So the correct option is B.

Lichens growing on rocks are called _______

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

  1. Saxicolous

  2. Corticolous

  3. Lignocolous

  4. Terricolous

Show answer
Correct Option: A

In lichen, the fungus provides

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

  1. Protection, anchorage and absorption for alga

  2. Food for alga

  3. Oxygen for alga

  4. Fixes nitrogen for alga

Show answer
Correct Option: A
Explanation:

Lichen is a symbiotic association between blue-green algae and fungus. In this, blue-green algae provide food and nutrition obtained by photosynthesis. In turn, fungus provides protection, anchorage and absorption of water and nutrition from soil for algae.

Thus, the correct answer is option A.

The most common photobiont from green algae in lichen thallus is :

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

  1. Trebouxia

  2. Tetraspora

  3. Chlamydomonas

  4. Ulothrix

Show answer
Correct Option: A
Explanation:

The majority of lichen photobionts belong to the green algal class Chlorophyceae, with the most common genera being Trebouxia.

So the correct option is A.

The two micro-organisms which live in symbiotic association in lichens are

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

  1. Fungus and protozoa

  2. Alga and bacteria

  3. Bacteria and protozoa

  4. Alga and fungus

Show answer
Correct Option: D
Explanation:

A lichen is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont) growing together in a symbiotic relationship.