Entry of pollen tube into ovule through chalaza was first discovered by Treub in a xerophyte. The plant is associated with a pair of characters(i) Unisexual flowers (ii) Sessile flowers (iii) Centripetal arrangement of flowers (iv) Bisexual flowers. The correct pair is?

ii and iii

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iii and iv

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ii and iv

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i and ii

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Solution

The correct option is C i and ii
The entry of the pollen tube into the ovule through the chalaza is known as the chalazogamy. This was discovered by Treub. One such example of xerophyte is Casuarina, which is a plant which can withstand prolonged periods of drought. A flower is a bracteate, bracteolate, sessile, incomplete and unisexual.

Thus, the correct option is D.

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Similar questions

Q. Entry of pollen tube into the ovule through chalaza was first discovered by Treub in a xerophytes. This plant is associated with a pair of characters given below

I) Unisexual flowers II) Sessile flowers

III) Centripetal arrangement of flowers IV) Bisexual flowers

The correct pair is

Question 17
Which of the following statements are true about unisexual flowers?

(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross-pollination
(iv) Unisexual flowers possessing only stamens cannot produce fruits

(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i), (iii) and (iv)

Q. Which of the following statements are true for flowers?
(i) flowers are always bisexual
(ii) they contain sexual reproductive organs
(iii) they are produced in all groups of plants
(iv) after fertilisation they give rise to fruits

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Question 16
Which of the following statements are true about flowers?

(i) Flowers are always bisexual
(ii) They are the sexual reproductive organs
(iii) They are produced in all groups of plants
(iv) After fertilization, they give rise to fruits

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Q. Bisexual, sessile and bracteate flowers develop acropetally in

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