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Assertion :- Plants are devoid of specia...

Assertion :- Plants are devoid of specialised respiratory organs.
Reason:- Each plant part takes care of it's own gaseous exchange needs .

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

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The correct Answer is:
A
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Assertion (A): In plants there are no specialised respiratory organs. Reason (R): Plants do not require great demands of gaseous exchange.

What are the reasons why plants can get along without respiratory organs? a. Each plant part takes care of its own gas exchange needs. There is very little transport of gases from one plant part to another. b. Plants do not present great demands for gaseous exchange, root, stem and leaves respire at rates far lower than animals do. c. The distance that gases must diffuse even in large, bulky plants is not great.

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Assertion :- Old woody plant parts are devoid of primary phloem. Reason :- Primary phloem gets crushed due to continuous formation and accumulation of secondary xylem.

Assertion : Plants lack excretory organs. Reason : Plant usually absorb essential nutrients and lead a passive life.

Give three reasons why plants can get along without respiratory organs.

MOTION-RESPIRATION IN PLANTS -EXERCISE - 4
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  2. Assertion :- During oxidation of respiratory substrate energy does not...

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  3. Assertion :- Plants are devoid of specialised respiratory organs. R...

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  4. Assertion :- In plants there is no need of respiratory and Circulatory...

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  5. Assertion :- Cells oxidise glucose and other respiratory substances no...

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  6. Assertion :- Glycolysis is the oxidative process, while there is not u...

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  7. Assertion :- For complete breakdown of respiratory substrate Krebs cyc...

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  8. Assertion :- In Natural alcoholic drinks (beverages) alcohol level can...

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  9. Assertion :- Aerobic respiration yields more energy than anaerobic res...

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  10. Assertion :- Maximum two decarboxylations can occur in each turn of Kr...

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  11. Assertion :- Ubiquinone is one of the important earlier of respiratory...

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  12. Assertion :- Cytochrome-C is the mobile carrier. Reason:- Cytochrom...

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  13. Assertion :- Oxygen is vital for aerobic respiration. Reason:- Oxyge...

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  14. Assertion :- In ETS of respiration, oxidation of one carrier and reduc...

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  15. Assertion :- The passage of protons through complex-V is coupled to pr...

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  16. Assertion :- Calculation of the net gain of ATP for every glucose mole...

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  17. Assertion :- Fermentation accounts for only a partial breakdown of glu...

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  18. Assertion :- During fermentation oxidation of NADH to NAD^(+) is c...

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  19. Assertion :- Respiratory path is an amphibolic pathway rather than as ...

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