Advertisements
Advertisements
प्रश्न
Triple fusion involves ______.
पर्याय
Fusion of male gamete with female gamete
Fusion of tube nucleus with generative nucleus
Fusion of two polar nuclei
Fusion of second male gamete with two polar nuclei
Advertisements
उत्तर
Triple fusion involves fusion of second male gamete with two polar nuclei.
APPEARS IN
संबंधित प्रश्न
Give one example of a unisexual flower.
State the function of flowers in the flowering plants.
How is the process of pollination different from fertilization?
The process of fusion of the male and female gametes is called ______.
Mature ovary forms the ______.
State the name of the functional unit concerned with sexual reproduction.
What is the name of female part of a flower?
Name the part of a seed which contains stored food.
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
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
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?
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
Fill in the blank:
Seeds are formed from________.
Mention the function of Stigma.
Draw a labelled diagram of a bisexual flower.
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival – the one reproducing asexually or the one reproducing sexually? Give reason to justify your answer.
You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.
Write the names of male and female reproductive parts of a flower.
What is phototropism?
List any two differences between pollination and fertilization.
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Bisexual : Hibiscus : : Unisexual : ___________
Define.
Inflorescence
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
Which of the following are the chemical components of the wall of pollen tube?
Antipodal cells are present towards the ______ in an anatropous ovule.
Generally, in a pollen tube, which of the following moves to the tip of the tube?
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 process of release of eggs from the ovary is called ______
In human beings, fertilization occurs in the ______
Variations occur as a result of ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
The ovaries of different flowers may contain ______.
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.
