Lichens

Q.

Why are lichens called a pollution indicator?

Q.

What are two human uses for algae?

Q.

Write a note on lichens.

Q.

Define mycorrhiza. How it is benefited to plants?

Q. Characteristics of algae

Q.

Why are mycorrhizae important?

Q. Lichens are symbiotic relationships between fungi and algae.

1. True
2. False

Q.

What is Symbiotic? Give example of organisms which exhibit this relationship.

Q.

What is the function of phycobiont?

Q.

Is lichen used in medicine?

Q.

Lichens are called pioneer colonizers of bare rock. How can they help in the formation of soil?

Q.

What Is The Algal Component In Lichens Called?

Q.

Which forest plant shows stunted growth if deprived of root associations with fungus?

Q.

Choose the correct option-

A location with the luxuriant growth of lichens on the trees indicates that the?

1. Trees are very healthy

2. Location is highly polluted

3. Trees are heavily infested

4. Location is not polluted

Q.

What are Mycobiont and Phycobiont?

Q.

Lichens are the associations of:

1. fungus and algae

2. bacteria and fungus

3. algae and bacterium

4. fungus and virus

Q.

Application of nitrogenous manure to a plant causes:

1. Vigorous vegetative growth

2. Growth retardation due to toxicity of NH₃

3. Early flowering

4. Early fruiting

Q.

Name one organism that is sensitive to sulfur dioxide pollution.

Q. What is lichens?

Q.

Lichen is a symbiotic relationship between_____i_____ and____ii____.

The information in which alternative completes the given statement?

1. 

2. 

3. 

4. 

Q. Name the algal and fungal component of Lichens.

Q. The fungal component of lichen is called?

1. Phycobiont
2. Photobiont
3. Mycobiont
4. Symbiont

Q. Lichens are called pioneer colonisers of bare rock. How can they help information of soil?

Q. The litmus paper or the litmus solution is obtained from __________ plant.

1. Moss
2. Lichen
3. Rose
4. Hibiscus

Q. There exists a close association between the alga and the fungus within a lichen. The fungus -

1. Provides food for the alga
2. Provides protection, anchorage and
   absorption for the alga
3. Fixes the atomospheric nitrogen for the alga
4. releases oxygen for the alga

Q. Give the economic importance of lichens.

Q. Mycorrhiza is a symbiotic associated of fungus with root system which helps in
A. absorption of water
B. mineral nutrition
C. translocation
D. gaseous exchange.

1. Only A
2. Only B
3. Both A and B
4. Both B and C

Q. Fungal partner of a lichen is commonly

1. Basidiomycetes
2. Deuteromycetes
3. Phycomycetes
4. Ascomycetes

Q. Lichens are described as indicators of :

1. Soil pollution
2. Water pollution
3. Agricultural productivity
4. Air pollution

Q. Lichens can be used as

1. Bio-indicator for water and air pollution
2. Initial vegetation for waste lands.
3. Source of wood
4. To check the air pollution