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प्रश्न
Pollen grains are formed by _________ division in locules of anthers.
पर्याय
meiosis
mitosis
amitosis
binary
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उत्तर
Pollen grains are formed by meiosis division in locules of anthers.
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संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
Give one example of a unisexual flower.
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
A flower may have either male or female reproductive parts. Such a flower is called ______.
Explain what you understand by sexual reproduction.
Where are the pollen grains produced?
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Explain the terms 'cross-pollination'?
In the figure given alongside, the parts marked A, B and C are sequentially:
In what ways is fertilisation in a plant different from fertilisation in a human?
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Mention the function of Flower.
Mention the function of Stigma.
List any two differences between pollination and fertilization.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
What is meant by pollination?
Pollen grains from anther are transferred to the stigma.
Write the functions of sepals
Distinguish between self-pollination and cross-pollination.
In which part of the flower germination of pollen grains takes place?
The anther wall consists of four wall layers where ______
The ovule of an angiosperm is technically equivalent to ______
In a flowering plant, archesporium gives rise to ______.
Conidia are formed endogenously while zoospores are formed endogenously.
The flower of the Hibiscus plant is ______
The seed that contains the future plant is called the ______
Length of pollen tube depends on the distance between ______
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Double fertilization is exhibited by ______
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
Explain the post fertilization changes that occur in the ovary of a flower.
State the post-fertilisation changes that lead to fruit formation in plants.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
