Define external fertilization. Mention its disadvantages.
External fertilization: It means fertilization takes place outside the body.
In external fertilization, eggs have less chances of fertilization. This can lead to the wastage of a large number of eggs produced during the process.
Further, there is an absence of proper parental care to the offspring, which results in a low rate of survival in the progenies.
the fusion of compatible gametes outside the body of the parents is called external fertilization.
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Must need to add- Amphibians syngamy occurs in external medium (water),I.e.,outside the body of the organisms is called external fertilization