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What is the direction of micropyle in an...

What is the direction of micropyle in anatropous ovule?

A

upward

B

downard

C

right

D

left

Text Solution

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The correct Answer is:
B
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State the function of micropyle.

Which of the following describes the position of micropyle and chalaza in an orthotropous ovule ?

(a) Draw a labelled diagram of the sectional view of a typical anatropous ovule. (b) Mention the fate of all the components of the embryo sac after fertilization

(a) Draw a diagrammatic sketch of the sectional view ofa typical anatropous ovule. (b) List the components of the embryo sac and mention their fate on fertilisation.

Ovules are classified on the basis of the position of micropyle with respect to funicle.

Micropyle is found in

What is the characteristic of amphitropous ovule

(a) Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it : (i) that develops into seed coat. (ii) that develops into an embryo after fertilization. (iii) that develops into an endosperm in an albuminous seed. (iv) through which the pollen tube gains entry into the embryo sac. (v) that attaches the ovule to the placenta. (b) Describe the characteristic features of wind pollinated flowers.

(a) Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it : (i) that develops into seed coat. (ii) that develops into an embryo after fertilization. (iii) that develops into an endosperm in an albuminous seed. (iv) through which the pollen tube gains entry into the embryo sac. (v) that attaches the ovule to the placenta. (b) Describe the characteristic features of wind pollinated flowers.

Draw a neat and labelled diagram of a mature anatropous ovule before fertilisation.

AAKASH INSTITUTE ENGLISH-SEXUAL REPRODUCTION IN FLOWERING PLANTS -Assignment (SECTION C)
  1. Which of the folliwng statement is wrongs?

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  2. Long ribbon like pollen grains are seen in some

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  3. Which one of the following pairs of plant structures has haploid numbe...

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  4. Embryo sac represents

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  5. Female plant is diploid and male plant is tetraploid. Find out the cor...

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  6. The significance of double fertilization is that it

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  7. An interesting modification of flower shape for insect pollination occ...

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  8. Endosperm is formed during the double fertilization by:

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  9. Anemophily type of pollination is found in

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  10. What is the direction of micropyle in anatropous ovule?

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  11. In angiosperms, all the four microspores of a tetrad are covered by a...

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  12. In angiosperms, pollen tube liberates its male gamets into

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  13. An ovule which becomes curved so that the nucellus and embryo sac lie ...

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  14. When a diploid female plant is crossed with a tetraploid male, the plo...

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  15. Polyembryony commonly occurs in

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  16. Eight nucleated embryosac is a:

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  17. Adventative embryony in Citus is due to

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  18. In a flowering plant, archesporium gives rise to

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  19. In a type of apomixids known as adventive embryony embryos develop dir...

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  20. Function of filiform apparatus is to

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