Lichens

Q. In lichens, phycobiont provides ___________ to mycobiont.

1. food
2. minerals
3. shelter
4. all of these

Q.

Which of the following are the most suitable indicators of ${\mathrm{SO}}_2$ pollution in the environment?

1. Conifers

2. Lichens

3. Algae

4. Fungi

Q.

Explain symbiosis.

Q.

Lichens indicate pollution of

1. NO₂

2. CO

3. O₃

4. SO₂

Q. Which type of interaction is seen in lichen?

1. Mutualism
2. Parasitism
3. Commensalism
4. Amensalism

Q.

How is lichen used as an indicator for air pollution?

Q. In lichens,

1. the phycobiont is benefitted while the mycobiont is harmed
2. the phycobiont is harmed while the mycobiont is benefitted
3. both phycobiont and mycobiont are benefitted
4. the phycobiont is benefitted while the mycobiont is neither benefited nor harmed

Q.

Why do not lichens occur in Delhi whereas they commonly grow in Manali or Darjeeling?

Q. Lichens are formed from organisms belonging to the Kingdoms:

1. Monera and Fungi
2. Mycota and Plantae
3. Plantae and Animalia
4. Both a and b

Q.

Identify the incorrect statement about lichens____.

1. They show fungal and algal symbiotic relationship

2. They grow very rapidly (2 cm per day)

3. Some species are eaten by reindeers

4. They are pollution indicators.

Q. In lichens,

1. the phycobiont is benefitted while the mycobiont is harmed
2. the phycobiont is harmed while the mycobiont is benefitted
3. both phycobiont and mycobiont are benefitted
4. the phycobiont is benefitted while the mycobiont is neither benefited nor harmed

Q. Lichens are good indicators of

1. soil pollution
2. water pollution
3. air pollution
4. agricultural productivity

Q.

Select the correct match from the following.

1. Phytoplankton – Protozoa

2. Holozoic nutrition – Fungi

3. Parasitic protists – Slime moulds

4. Symbiosis – Lichens

Q.

The algal component of a lichen is known as

1. Mycobiont

2. Phycobiont

3. Phycocyanin

4. Phycoerythrin

Q. Which of the following organisms are not found in areas polluted with sulphur dioxide?

1. Green plants
2. Lichens
3. Blue green algae
4. Herbivores

Q. A lichen is an example of a symbiotic relationship between a fungus and an alga. Identify the right statement(s) below based on the function of the fungal member.

1. Provides protection for the algae
2. Provides anchorage for the algae
3. Absorb water and minerals for algae
4. All of the above