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प्रश्न
Pollen grains are formed by _________ division in locules of anthers.
पर्याय
meiosis
mitosis
amitosis
binary
उत्तर
Pollen grains are formed by meiosis division in locules of anthers.
APPEARS IN
संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
Answer the following question.
State significance of pollination.
State the function of flowers in the flowering plants.
The fusion of male and female gametes is termed as ______.
Explain what you understand by sexual reproduction.
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 stamen of a flower. Mark in it filament and anther.
Explain the terms 'cross-pollination'?
How do the insects help in cross-pollination?
What type of plants reproduce by sexual reproduction method?
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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.
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
In what ways is fertilisation in a plant similar to fertilisation in a human?
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Fill in the blank:
Seeds are formed from________.
Mention the function of Stigma.
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.
Identify A, B, C and D in the given diagram and write their names.
Write the names of male and female reproductive parts of a flower.
Prepare a slogan for campaign against female foeticide.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Pollen grains from anther are transferred to the stigma.
Define.
Inflorescence
Distinguish between self-pollination and cross-pollination.
Observe the figure below. Write functions of the labelled parts.
Identify the parts A, B, C, and D?
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Sperm and egg nuclei fuse due to ______.
The process of release of eggs from the ovary is called ______
In human beings, fertilization occurs in the ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female 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.
Explain the post fertilization changes that occur in the ovary of a flower.
