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प्रश्न
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
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उत्तर
Unisexual flowers have only one kind of sex organ, either stamen or pistil, e.g., flowers of papaya and water melon. Bisexual flowers have both stamen and pistil, e.g., flowers of Hibiscus and mustard.
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संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
Give one example of a unisexual flower.
The fusion of male and female gametes is termed as ______.
How does the process of fertilisation take place in flowers?
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 made in anther of a flower?
Give some examples of different modes of fertilisation in nature?
Name the part of a seed which contains stored food.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
In what ways is fertilisation in a plant different from fertilisation in a human?
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.
The students of a class were asked by the teacher to study the different parts of an embryo of an angiosperm. Given below are the essential steps for the experiment :
A. Soak the seeds in plain water and keep them overnight.
B. Cut open the soaked seed and observe its different parts.
C. Take some healthy seeds in a petri-dish.
D. Drain the excess water, cover the seeds with a wet cotton cloth and leave them as it is for a day.
The correct sequence of these steps is
(a) C, A, D, B
(b) C, D, A, B
(c) A, C, D, B
(d) A, C, B, D
What does germination mean?
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?
Double fertilization is exhibited by ______
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
State the post-fertilisation changes that lead to fruit formation in plants.
