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प्रश्न
What are the agents for pollination?
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उत्तर
Pollination occurs with the help of abiotic agents (wind, water) and biotic agents (insects and other animals).
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संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
Name and differentiate between the two modes of pollination in flowering plants.
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
The fusion of male and female gametes is termed as ______.
The reproductive part of a plant is the ______.
The process of fusion of the male and female gametes is called ______.
Mature ovary forms the ______.
Name the part made up of the stigma, style and ovary.
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
What is made in ovary of a flower?
How do the insects help in cross-pollination?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
What is pollination? How does pollination occur?
Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross pollination
(iv) Unisexual flower possessing only stamens cannot produce fruits
(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (i), (iii) and (iv)
The correct sequence of reproductive stages occurring in flowering plants is ______
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?
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
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.
What is phototropism?
List any two differences between pollination and fertilization.
Explain sexual reproduction in plants.
Answer the following question.
List two agents of pollination?
Find an odd one out.
Find an odd one out.
Calyx : Sepals : : Corolla : ________________
Explain the sexual reproduction process in plants with a diagram.
The essential parts of a flower are ______.
The anther wall consists of four wall layers where ______
Which of the following is the outermost protective layer of anther?
How many middle layers are generally present in the wall of the anther lobes?
Which type of development is observed in male gametophytes of plants?
Identify the female gametophyte in angiosperms.
Flowers showing ornithophily show few characteristic like ______.
In human beings, fertilization occurs in the ______
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
Where is the zygote located in the flower after fertilization?
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Sketch and label the essential and accessory whorls of flower.
