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प्रश्न
Differentiate between internal fertilization and external fertilization.
उत्तर
| Internal fertilization | External fertilization |
| It involves the fusion of the male and the female gamete inside the female body. | It involves the fusion of the male and the female gamete outside the female body. |
| Chances of the survival of the offspring are more. Therefore, a small number of eggs are produced. | Chances of survival of the offspring are less. Therefore, a large number of eggs are produced. |
| Humans, cows, hens are organisms showing internal fertilization. | Fish, frog, starfish are organisms showing external fertilization. |
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संबंधित प्रश्न
In which female reproductive organ does the embryo get embedded?
The advantage that internal fertilisation has over external fertilisation is that in internal fertilisation :
(a) new off-springs are exactly like the parent
(b) production of large numbers of gametes is unnecessary
(c) copulation and fusion of gametes is passive
(d) fewer individuals are produced
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
Name the organ involved in the following:
Fertilisation of ovum by tile sperm.
Meiosis is an essential event in the sexual life cycle of any organism. Give two reasons.
Answer in one sentence.
Outline the path of sperm upto the urethra.
What are the different stages of sexual reproduction?
______ fertilisation takes place in frogs and fish.
In ______ animals, the development of the embryo takes place inside the body.
Between an annual and a perennial plant, which one has a shorter juvenile phase? Give one reason.
