Lichens- Reproduction and Economic Importance

1. Vegetative reproduction in lichen occurs by 

a) Soredia
b) Isidia
c) fragmentation
d) all of these

2. In sexual reproduction, the fruiting body formed is of 

a) apothecium type
b) perithecium type
c) both and b
d) none of these

3. Asexual reproduction in lichen takes place by formation of 

a) zygopores
b) aplanospores
c) pycnidiospores
d) chlamydospores

4. In lichens, sexual reproduction is carried out by 

a) fungal partner
b) algal partner
c) both a and b
d) depends on habitat

5. The male reproductive organ is called 

a) carpogonium
b) trichogyne
c) hymenium
d) spermagonium

6. The female reproductive organ is called 

a) carpogonium
b) trichogyne
c) hymenium
d) spermagonium

7. The fertile layer of ascocarp where ascus is located is called 

a) paraphysis
b) hymenium
c) peridium
d) subhymenium

8. Each ascus contains generally 

a) 2 ascospores
b) 4 ascospores
c) 8 ascospores
d)16 ascospores

9. If both algal cells and fungal hyphae are uniformly distributed in lichen formation, then called as 

a) homoisomerous lichen
b) heteroisomerous lichen
c) homoheteroisomerous
d)hemiisomerous lichen

10. Litmus is obtained from 

a) Usnea
b) Cladonia
c) Peltigera
d) Roccella

11. Which of the lichen is used to treat hydrophobia? 

a) Peltigera
b) Cetraria
c) Cladonia
d) Graphis

12. Usnic acid, a broad spectrum antibiotic is obtained from 

a) Usnea
b) Cladonia
c) both a and b
d) Usnea only

13. Which of the following lichen is called as the “reindeer moss” (food for reindeer) 

a) Cetraria islandica
b) Cladonia rengiferina
c) Peltigera canina
d) Evernia

14. Which of the following lichen are the pioneers in xerosere 

a) foliose lichens
b) leprose lichens
c) crustose lichens
d) frusticose lichen

15. Letharia vulpine is a poisonous lichen as they secrete 

Letharia vulpine 

a) letharic acid
b) vulpinic acid
c) usnic acid
d) selinium

Answers

1. d) all of these
2. c) both and b
3. c) pycnidiospores
4. a) fungal partner
5. d) spermagonium
6. a) carpogonium
7. b) hymenium
8. c) 8 ascospores
9. a) homoisomerous lichen
10. d) Roccella
11. a) Peltigera
12. c) both a and b
13. b) Cladonia rengiferina
14. c) crustose lichens
15. b) vulpinic acid