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प्रश्न
What is meant by sexual reproduction?
What is sexual reproduction?
उत्तर
Sexual reproduction: The process of reproduction which involves the fusion of two gametes for the production of a young one is called sexual reproduction.
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संबंधित प्रश्न
Give the importance of variation in survival of species.
List three distinguish features between sexual and asexual types of reproduction, in tabular form.
What are the advantages of sexual reproduction over asexual reproduction?
How does reproduction help in providing stability to populations of species?
Define Reproductive phase
What is amphimixis?
Advantages of sexual reproduction.
Explain how, in sexually reproducing organisms, the number of chromosomes in the progeny is maintained.
What is the other name of sex cells?
name the organ which produces male sex cells.
What are gametes?
What is this act of fusion called?
Name two plants which reproduce by sexual reproduction method and two plants which reproduce by asexual reproduction methods.
The number of chromosomes in parents and offsprings of a particular species remains constant due to :
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation
Define the term Fetilization.
Find the odd one out, give reason:
Testes, epididymis, uterus, vas deferens
Differentiate between the following:
External fertilisation and Internal fertilisation.
Name the organ involved in the following:
Fertilisation of ovum by tile sperm.
Describe the different methods of asexual reproduction in animals.
“The chromosomes number of the sexually reproducing parents and their offspring is the same.” Justify this statement.
Sketch and label the diagram showing self- and cross-pollination.
In the sexual mode of reproduction, greater diversities are generated.
Answer in one sentence.
Which glands contribute fluids to the semen?
Answer in one sentence.
Enlist the external genital organs in the female.
Answer the following question.
Which is the function of male accessory glands?
Long answer question.
Describe female reproductive system of human.
Identify the labels from the given diagram.
Give reason for the following:
Some organisms like honey bees are called parthenogenetic animals
Animals giving birth to young ones: ______
Name the phenomenon where the female gamete directly develops into a new organism with an avian example.
Which organs/glands produce eggs and sperms?
Characters that are transmitted from parents to offspring during reproduction show ______
In ______ animals, the development of the embryo takes place inside the body.
Explain the formation of the embryo.
Zygote develop a thick wall that is resistant to dessication and damage is present in ______.
With which type of reproduction do we associate the reduction division? Analyse the reasons for it.
Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand a tomato plant produces plenty of fruits though they have small flowers. Analyse the reasons for failure of fruit formation in rose.
Both these plants - rose and tomato - both selected by human beings for different characteristics, the rose for its flower and tomato for its fruit. Roses, being vegetatively propagated do not need to produce seeds.
