Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Mycorrhiza

1. The symbiotic relationship between fungi and roots of higher plants is called
Mycorrhizal_Root_Tips
a) lichen
b) Mycorrhiza
c) Helotism
d) mutualism
2. The advantage of fungus in this association is
a) food
b) protection
c) mineral absorption
d) all of these

3. In mycorrhiza, the fungus may form colonies
a) extracellularly
b) intracellularly
c) both a and b
d) depends on conditions
4. The advantage of plants in this association is
a) food
b) protection
c) increased mineral absorption and disease protection
d) all of these
5. The endomycorrhizas are also called as 

vam
a) hartig nets
b) mat forming mycorrhizas
c) Vesicular Arbuscular Mycorrhiza (VAM)
d) intracellular mycorrhizas

6. The ectomycorrhizas are commonly formed in
a) herbaceous plants
b) woody plants
c) all plants
d) grasses
7. The ectomycorrhizas form an intercellular network in root cortex called

ectomycorrhiae
a) arbuscules
b) vescicles
c) hartig net
d) haustoria
8. The characteristic feature of VAM is it penetrates plant cell wall and form
a) spores intracellularly
b) vescicles and dichotomously branched invaginations called arbuscules
c) haustoria
d)massive spore forming structures intracellularly
9. The major advantage of a plant with VAM is
a) increased N2 absorption
b) increased P absorption
c) increased K absorption
d) increased Mn absorption
10. The fungal partner in ectomycorrhiza belongs to the class
a) Basidiomycetes
b) Ascomycetes
c) Zygomycetes
d) all of the above
11. The fungal partner in VAM belongs to the class
a) Basidiomycetes
b) Ascomycetes
c) Zygomycetes
d) Glomeromycetes
12. The endomycorrhizal association is present in
a) 10% of plant families
b) 40% of plant families
c) 85% of plant families
d) less than 5% of plant families

13. Heterokaryosis (presence of many genetically different nuclei in an individual) is a character noticed in
a) endomycorrhizal fungi
b) ectomycorrhizal fungi
c) plants roots
d) herbaceous plant roots
14. The ectomycorrhizae are commonly found in
a) 10% of plant families
b) 40% of plant families
c) 85% of plant families
d) less than 5% of plant families
15. The endomycorrhizae are found in

endomycorrhizae
a) herbaceous plants
b) woody plants
c) grasses
d) all type of plants
Answers 
1. b) Mycorrhiza
2. a) food
3. c) both a and b
4. c) increased mineral absorption and disease protection
5. c)Vesicular arbuscular mycorrhizas
6. b) woody plants
7. c) hartig net
8. b) vescicles and dichotomously branched invaginations called arbuscules
9. b) increased P absorption
10. d) all of the above
11. d) Glomeromycetes
12. c) 85% of plant families
13. a) endomycorrhizal fungi
14. a) 10% of plant families
15. d) all type of plants

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