MCQ ON MYCORRHIZAE class 12 for NEET

MCQ ON MYCORRHIZAE class 12 for NEET | MYCORRHIZAE class 12 | MCQ MYCORRHIZAE with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on MYCORRHIZAE class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on MYCORRHIZAE with Answers to help students understand the concept very well.

MCQ ON MYCORRHIZAE is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:
The term mycorrhiza was coined by Frank in 1885 which simply means an association of fungi with the roots of higher plants.
The nature of dis association is true symbiosis mutualism. The mycorrhiza roots lack root cap and root hairs. They change their shapes and may become tuberous , nodulated or coralloid.There are two kinds of mycorrhiza – ectomycorrhiza and endomycorrhiza . Ectomycorrhiza is also called ectotrophic mycorrhiza .In this form of association , the fungal mycelium completely encloses the feeder rootlets forming sheath or mantle.The hyphae penetrate the intercellular spaces of the root cortex to form a network called the Hartig net.Ectomycorrhizae are known to occur in pinus ,oak, betula . Endomycorrhiza is also called endotrophic mycorrhiza. In this form of association, the fungus does not form an external sheath or mantle. The fungus mostally lives in in the intercellular species as well as in the cortical cells of roots. Only small portion of fungus lives outside the root. Sach type of mycorrhiza association occurs in the roots of grasses ,cereals,legumes,
rubber, tea, tobacco etc.One of the most important type of endomycorrhiza is Vesicular- arbuscular mycorrhiza (VAM). In this association, the fungal mycelium forms some special kinds of organs called vesicles and arbuscules, within the root cortical cells.Vesicles are thick walled swollen structures whereas arbuscules are dichotomously branched haustorial branches of mycelium formed either in the intercellular spaces .

MCQ ON MYCORRHIZAE class 12 for NEET

1. The term mycorrhiza was coined by

(a) Frank
(b) Robert hook
(c) Galtin
(d) Brown

Ans (a) Frank

2. Mycorrhiza is association of

(a) fungus with the roots of higher plants
(b) Fungus with algae
(c) fungus with bacteria
(d) none of the above

Ans. (a) fungus with roots of higher plants

3. Mycorrhiza is an example of

(a) symbiosis
(b) amensalism
(c) parasitic
(d) competition

Ans. (a) symbiosis

4. Mycorrhiza roots lack

(a) root cap
(b) root hair
(c) both a and b
(d) Carison

Ans.(c) both a and b

5. Mycorrhiza roots change their shapes and may become

(a) tuberous
(b) nodulated
(c) coralloid
(d) all the above

Ans.(d) all the above

6. The major function of ectomycorrhiza

(a) absorption of water
(b) solubilization of complex organic molecules
(c) protection of plants from attack of disease inciting pathogens by secreting antibacterial substances
(d) all the above

Ans.(d) all the above

7. Vascular arbuscular mycorrhiza (VAM) is

(a) ectomycorrhiza
(b) endomycorrhiza
(c) both a and b
(d) none of the above

Ans.(b) endomycorrhiza

8. Mycorrhiza helps in

(a) nitrogen fixation
(b) killing insects
(c) enhance absorption of nutrients and water from soil
(d) providing resistance against abiotic stresses

Ans.(c) enhance absorption of nutrients and water from soil

9. One of the following is a bio fertilizer

(a) CMU
(b) DCMU
(c) VAM
(d) Agent Orange

Ans. (c) VAM

10. IPM stands for

(a) international pest management
(b) integrated pest management
(c) integrated plant management
(d) Indian pest management