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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
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below:
Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon.
On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
(a) Testa, Radicle, Cotyleddon
(b) Tegmen, Radicle, Micropyle
(c) Cotyledon, Plumule, Testa
(d) Radicle, Cotyledon, Plumule
State significance of pollination.
Name the parts labelled as A, B, C and D in the diagram given below:
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
The anther contains ______.
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
Explain the terms 'cross-pollination'?
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
Answer the following question.
How does suitable pollination lead to fertilization?
What does germination mean?
In which part of the flower germination of pollen grains takes place?
Sketch and label the essential and accessory whorls of flower.
Give any two examples of agents of pollination.
In a plant flower the female whorl is ______.
What is the function of calyx?
Name the reproductive parts of an angiosperm. Where are these parts located? Explain the structure of its male reproductive part.
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
