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प्रश्न
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
विकल्प
(i) and (iv)
(ii), (iii) and (iv)
(iii) and (iv)
(i), (iii) and (iv)
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उत्तर
(ii), (iii) and (iv)
Explanation -
Flowers which possess either stamens or pistil are called unisexual flowers. These flowers are borne either on the same or different plants thus, pollen grains need to be transferred from one flower to another through agents like wind, water or animals, that is, cross pollination occurs. Since fruits develop from the ovary of the pistil, unisexual flowers with stamens only cannot bear fruits.
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संबंधित प्रश्न
A student identified the various parts of an embryo of a gram seed and listed them as given below :
(I) Testa
(II) Plumule
(III) Radicle
(IV) Cotyledon
(V) Tegmen
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(A) I, II, III
(B) II, III, IV
(C) III, IV, V
(D) II, IV, V
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