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प्रश्न
Pollen grains are formed by _________ division in locules of anthers.
विकल्प
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
Name the parts A, B and C shown in the diagram and write their functions.
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
Name and differentiate between the two modes of pollination in flowering plants.
The anther contains ______.
Mature ovary forms the ______.
Name the male part of the flower.
What is the name of female organ of a flower (other than carpel)?
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
What is made in ovary of a flower?
Explain the terms 'self pollination'
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
In what ways is fertilisation in a plant similar to fertilisation in a human?
In what ways is fertilisation in a plant different from fertilisation in a human?
Fill in the blanks:
A stamen consists of ______ and ________.
Mention the function of Flower.
What part is played by stamens and carpels in reproduction?
Draw a labelled diagram of a bisexual flower.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Find an odd one out.
Calyx : Sepals : : Corolla : ________________
Pollen tube reaches the embryo sac via style.
Distinguish between self-pollination and cross-pollination.
Pineapple fruit develops from ______.
The flower of the Hibiscus plant is ______
The process of release of eggs from the ovary is called ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
The ovaries of different flowers may contain ______.
What are the agents for pollination?
Triple fusion involves ______.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
 |
In male reproductive whorl of a flower the archesporial cells are formed by ______.
