Lichens

Q. The fungus in a lichen provides to the alga. The alga in turn prepares and provides to the fungi.

1. carbon dioxide
2. water and minerals
3. food
4. sunlight

Q. Lichens are symbiotic relationships between fungi and algae.

1. True
2. False

Q. The mutually beneficial relationship found between algae and fungi in lichens is called ______.

1. saprotrophic relationship
2. autotrophic relationship
3. symbiotic relationship
4. parasitic relationship

Q.

Lichens are the associations of:

1. fungus and algae

2. bacteria and fungus

3. algae and bacterium

4. fungus and virus

Q. Lichens which grow on the barks of trees are called as

1. Corticolous
2. None of the above
3. Terricolous
4. Saxicolous

Q. Litmus is got naturally from

1. Fungi
2. Algae
3. Protozoans.
4. Lichens

Q. A location with luxuriant growth of lichens on the trees indicated that the :

1. Location is highly polluted.
2. Trees are very healthy.
3. Location is not polluted.
4. Trees are heavily infested.

Q. In lichen, fungus has :

1. Symbiotic relationship with alga.
2. Epiphytic relationship with alga
3. Saprophytic relationship with alga.
4. Parasitic relationship with alga.

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. Most common phycobiont in a lichen is

1. Microcytis
2. Trebouxia
3. Ulothrix
4. Spirogyra