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NODULE FORMATION...

NODULE FORMATION

A

Legume plant and nostoc

B

Legume plant and Rhizobium

C

Legume plant only

D

Rhizobium only

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The correct Answer is:
B
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Consider the following steps involved in nodule formation in the root of a legume. (i). Bacteria release chemicals and enzymes. (ii). Bacteria stop dividing and form bacteroides. (iii). Roots secrete chemical atractants. (iv). Formation of infection thread. (v). Formation of nodules. (v). Formation of nodulues. (vi). Division of infected cortical cells. (vii) Curlinig of root hair and degradation of their cell wall. (viii). Infection thread grows along with multiplication of bacteria. Arrange the steps in the right sequence and mark the correct option

(i) Thin thread like chromosomes with a beaded appearance (ii) Appearance of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Arrange the given statemetns in the correct sequence of their occurrence during prophase I.

(i) Thin thread like chromosomes with a beaded appearance (ii) Appearance of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Identify the different stages with respect to the above given features and select the correct option.

Assertion : Nitogen - fixing bacteria in legume root nodules survive in oxygen - depleted cells of nodules. Reason : Leghaemoglobin completely removes oxygen from the nodule cells.

Nodulated roots bearing family is

Nodulated roots occur in

Nodulated roots are characteristic of family

Nodules with nitrogen fixing bacteria are present in

MOTION-MINERAL NUTRITION -EXERCISE-4
  1. NODULE FORMATION

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  2. Which of the following is a group of micronutrients for plants?

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  3. Assertion :- Hydroponics is one of the investigatory method to study m...

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  4. Assertion :- In hydroponics nutrient solutions must be adequately aera...

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  5. Assertion :- Deficiency of any essential element can not be met by sup...

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  6. Assertion :- Boron is one of the essential micro element or trace elem...

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  7. Assertion :- Potassium plays an important role in opening and closing ...

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  8. Assertion :- Calcium is required by meristematic cells. Reason:- Ca ...

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  9. Assertion :- Plants show chlorosis on deficiency of iron. Reason:- I...

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  10. Assertion :- Boron is essential for sexual reproduction in flowering p...

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  11. Assertion :- In all plants Mo is essential for nitrogen metabolism. ...

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  12. Assertion :- The element is said to be deficient when present below th...

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  13. Assertion :- Deficiency symptoms of NPK first appear on old plant part...

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  14. Assertion :- Deficiency of any element can cause multiple symptoms. ...

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  15. Assertion :- Moderate decrease of micronutrients causes the deficiency...

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  16. Assertion :- Excess of Mn may induce deficiency of Fe, Mg & Ca. Reas...

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  17. Assertion :- Initial uptake of ions is rapid while second phase of upt...

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  18. Assertion :- Entire ammonia arise from ammonification get converted in...

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  19. Assertion :- Nitrifying bacteria are chemoautotrophs. Reason:- Nitri...

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  20. Assertion :- Conversion of nitrate to ammonia takes place in leaves wh...

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  21. Assertion :- Only certain prokaryotic species are capable of fixing ni...

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