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प्रश्न
Give some examples of different modes of fertilisation in nature?
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उत्तर
There are two modes of fertilisation, i.e., external fertilisation as seen in case of fishes and frogs, and internal fertilisation that happens in humans, dogs, etc.
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संबंधित प्रश्न
The fusion of male and female gametes is termed as ______.
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
Name the part of a seed which grows into shoot.
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(a) pollination, fertilisation, seed, embryo
(b) seed, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seed
(d) embryo, seed, pollination, fertilisation
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
What part is played by stamens and carpels in reproduction?
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.
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Draw a diagram of the longitudinal section of a flower and label on it sepal, petal, ovary and stigma.
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
__________ is present in unisexual flower.
Which of the following is the outermost protective layer of anther?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
In a flowering plant, archesporium gives rise to ______.
The process of release of eggs from the ovary is called ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
The ovaries of different flowers may contain ______.
What are the agents for pollination?
