Question

Differentiate between internal fertilisation and external fertilisation​

Answer 1

Answer:

hey mate

Explanation:

INTERNAL FERTILISATION:-

Internal fertilization is the union of an egg cell with a sperm during sexual reproduction inside the female body. For this to happen there needs to be a method for the male to introduce the sperm into the female's reproductive tract. In mammals, reptiles, some birds, some fish and certain other groups of animals, this is done by copulation, the penis or other intromittent organ being introduced into the vagina or cloaca. In most birds, the cloacal kiss is used, the two animals pressing their cloacas together while transferring sperm.Salamanders, spiders, some insects and some molluscs undertake internal fertilization by transferring a spermatophore, a bundle of sperm, from the male to the female. Following fertilization, the embryos are laid as eggs in oviparous organisms, or in viviparous organisms, continue to develop inside the reproductive tract of the mother to be born later as live young.

EXTERNAL FERTILISATION:-

External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body.[1] It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism.External fertilization typically occurs in water or a moist area to facilitate the movement of sperm to the egg.The release of eggs and sperm into the water is known as spawning.In motile species, spawning females often travel to a suitable location to release their eggs. However, sessile species are less able to move to spawning locations and must release gametes locally. Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes.Benthic marine plants also use external fertilization to reproduce. Environmental factors and timing are key challenges to the success of external fertilization. While in the water, the male and female must both release gametes at similar times in order to fertilize the egg. Gametes spawned into the water may also be washed away, eaten, or damaged by external factors...

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Answer 2

Internal fertilization is a process where the fusion of gametes occur inside a female body.

In external fertilization, the fusion of gametes occur outside the female body. i.e., in the outside environment.

Explanation:

• Fertilization process is the fusion of sperm and egg cell to form a completely new individual.  
• The advantage of internal fertilization is the protection of fertilized egg from dehydration in land.
• Also the survival rate of newborn in internal fertilization is higher than that of external fertilization.
• Examples of internal fertilization - Mammals, Reptiles, Birds
• External fertilization -  Amphibians, some Algae

Learn more:

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2) What is the meaning of internal fertilization and external fertilization explain with example:

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