A lichen that grows by branching is described as
(1) fruticose
(2) crustose
(3) foliose
(4) dichotose
which of the following structures helps in the respiration of lichens?
(1) Soredia
(2) Isidia
(3) Cyphella
(4) Cephalodia
Which of the following statement is correct?
| 1. | Fungi prepare food for algae. |
| 2. | Fungi provide shelter and absorb mineral nutrients and water for its partner. |
| 3. | The algal component is known as mycobiont and fungal component as phycobiont, |
| 4. | Lichens are symbiotic associations between algae and fungi which are heterotrophic and autotrophic, respectively. |
Which of the following are most suitable indicators of SO2 pollution in the environment?
1. Lichens
2. Conifers
3. Algae
4. Fungi
A location with luxuriant growth of lichens on the trees indicates that the:
1. Trees are very healthy
2. Trees are heavily infested
3. Location is highly polluted
4. Location is not polluted
Match the Column-I with Column-II
|
Column-I |
Column-II |
||
|
(a) |
Saprophyte |
(i) |
Symbiotic association of fungi with plant roots |
|
(b) |
Parasite |
(ii) |
Decomposition of dead organic materials |
|
(c) |
Lichens |
(iii) |
Living on living plants or animals |
|
(d) |
Mycorrhiza |
(iv) |
Symbiotic association of algae and fungi |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (iii) | (ii) | (i) | (iv) |
| 4. | (ii) | (i) | (iii) | (iv) |
State True (T) or False (F) to the given statements and select the correct option
| (A) | Abundance of lichens in any area indicates that the area is highly polluted with SO2. |
| (B) | Mycobiont partner of lichens is always heterotrophic. |
| (C) | Body of lichens is made up of phycobionts only. |
(A) (B) (C)
1. T T F
2. F T F
3. F F F
4. T F F
1. Viruses are obligate parasites
2. Prions are abnormally folded infectious proteins
3. Viroids are free RNA and lack a protein coat
4. Lichens grow very well in polluted areas
A: Algae (usually green)
B: Cyanobacteria
1. Only A
2. Only B
3. Either A or B
4. Neither A nor B
| Statement I: | Association between mycobiont and phycobiont is found in Lichens. |
| Statement II: | An association between roots of higher plants and fungi is called mycorrhiza. |
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
© 2026 GoodEd Technologies Pvt. Ltd.