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प्रश्न
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 fertilization they give rise to fruits.
विकल्प
(i) and (iv)
(ii) and (iii)
(i) and (iii)
(ii) and (iv)
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उत्तर
(ii) and (iv)
Explanation:
Plants have sexual reproductive organs such as stamen and pistil. Fruit is formed after fertilization in plants.
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संबंधित प्रश्न
State significance of pollination.
Give one example of a unisexual flower.
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
Explain the terms 'cross-pollination'?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
What is pollination? How does pollination occur?
Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross pollination
(iv) Unisexual flower possessing only stamens cannot produce fruits
(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (i), (iii) and (iv)
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
Mention the function of Anther.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
The essential parts of a flower are ______.
The ovule of an angiosperm is technically equivalent to ______
Sperm and egg nuclei fuse due to ______.
Variations occur as a result of ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
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
Where is the zygote located in the flower after fertilization?
The pollen tube usually enters the embryo sac ______.
