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प्रश्न
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
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उत्तर
A bisexual flower possesses both the male reproductive parts, stamens and female reproductive part, pistil. If the stamens are removed, pistil is present in the flower. On cross pollination followed by successful fertilisation, the ovary of the pistil would have developed into a fruit.
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संबंधित प्रश्न
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
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
You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open a soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is :
(A) III, I, V, IV, II
(B) III, I, II, IV, V
(C) III, IV, V, I, II
(D) III, I, IV, V, II
Name the part made up of the stigma, style and ovary.
Name the swollen lower part of the carpel.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
“Cell division is a type of reproduction in unicellular organism.” Justify.
Describe an activity to demonstrate phototropism.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Find the odd one out:
Distinguish between self-pollination and cross-pollination.
Draw a neat and labelled diagram.
Double fertilization in angiosperms
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Identify the female gametophyte in angiosperms.
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
In human beings, fertilization occurs in the ______
