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Which of the following statements regard...

Which of the following statements regarding the sturcture of microsporagium are correct ?
(i) Microsporangium is generally surrounded bu four wall layers-epiddermis, endothecium, middle alyers and tapectum
(ii) outer three layers perform functions of protection and dehiscence of anthers.
(iii) Cells of tapetum undergo misois and produce micropore tetrads.

A

(i) and (ii)

B

(ii) and (iii)

C

(i) and (iii)

D

(i),(ii) and (iii)

Text Solution

Verified by Experts

The correct Answer is:
A
A microsporangium or future pollen sac is a cylindrical sac which appears circular in transverse section. It consists of two parts, outer wall and central homogeneous sporgenous tissue. Microsporangial wall has four types of layers-epidermis, endothcium, `1-3` middle layers and tapetum. The outer three layers performs the function of protection in the young anther and mechanism of dehiscence in the ripe anther.
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NCERT FINGERTIPS-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
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  2. The function of labelled part X is

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  4. Callase enzyme which dissolved callose of pollen tetrads to separate f...

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  5. Which function of tapetum is correct?

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  6. In angiosperms various stages of reductional division can best be stud...

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  7. Study of pollen grains is called

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  8. Several pollen grains form a unit designated as pollinium in Family

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  9. The given figure represents

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  10. How many pollen mother cells should undergo meiotic division to produc...

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  11. How many meiotic divisions are required for the formation of 100 polle...

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  12. One of the most resistant biological material present in the exine of ...

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  13. Which of the following statements about sporopollenin is incorrect ?

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  14. What is the function of germ pore?

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  15. Read the given statements. (i) Outer exine is made up of sporopolle...

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  16. of the pollen grain divides to form two male gametes.

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  17. The three cells found in a pollen grain when it is shed at 3-celled st...

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  18. In a fully developed male gametophyte the number of nuclei is

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  20. Megasporangium along with its protective integuments is called

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