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प्रश्न
Type of sexual reproduction is ______.
विकल्प
Fragmentation
Regeneration
Gamete formation
Budding
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उत्तर
Type of sexual reproduction is Gamete formation.
Explanation:
Sexual reproduction is always accomplished with the assistance of two germ cells. Those two germ cells are female gametes and male gametes. Meiosis is the process by which gametes are formed. The number of chromosomes is reduced to half during meiosis, resulting in the formation of haploid gametes.
Notes
Gamete formation is a process involved in sexual reproduction. It is not a type of sexual reproduction.
APPEARS IN
संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
State significance of pollination.
Give one example of a unisexual flower.
Name the part made up of the stigma, style and ovary.
Name the swollen lower part of the carpel.
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
Ovules contain ......... gametes of a plant.
How do the insects help in cross-pollination?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is pollination? How does pollination occur?
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?
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Fill in the blank:
Seeds are formed from________.
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
State whether the following statement is true (T) or false (F):
Flowers which possess stamens and carpel are called unisexual.
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Identify A, B, C and D in the given diagram and write their names.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
Describe an activity to demonstrate phototropism.
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Mention pollination types.
Calyx : Sepals : : Corolla : ________________
Accessory whorls : Calyx and corolla : : essential whorls : ______________
Pollen grains from anther are transferred to the stigma.
Write the events involved in the sexual reproduction of a flowering plant.
a. Discuss the first event and write the types.
b. Mention the advantages and the disadvantages of that event.
Where does the endothecium layer of anther lobes is present?
Antipodal cells are present towards the ______ in an anatropous ovule.
Sperm and egg nuclei fuse due to ______.
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
The ovaries of different flowers may contain ______.
Sketch and label the essential and accessory whorls of flower.
What is the structural unit of sexual reproduction in plant?
What is the function of calyx?
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
The pollen tube usually enters the embryo sac ______.
The number of pollen sacs in a dithecous anther is ______.
