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प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
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उत्तर
A - Stigma
Function: Pollen lands and germination starts
B - Pollen tube
Function: It carries the pollen to the egg cell for fertilisation.
C - Egg cell
Function: It fuses with the male gamete to form a zygote.
संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
In what ways is fertilisation in a plant different from fertilisation in a human?
What are the male and female gametes in a flowering plant?
A student is asked to study the different parts of an embryo of pea seeds. Given below are the essential steps for the experiment :
(I) Soak the pea seeds in plain water and keep them overnight.
(II) Cut open the soaked seed and observe its different parts.
(III) Take some pea seeds in a petri dish.
(IV) 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) III, I, IV, II
(B) III, IV, I, II
(C) III, I, II, IV
(D) III, II, I, IV
“Cell division is a type of reproduction in unicellular organism.” Justify.
In human beings, fertilization occurs in the ______
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
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Type of sexual reproduction is ______.
