Question

Defineexternal fertilization. Mention its disadvantages.

Answer 1

External fertilizationis the process in which the fusion of the male and the female gametetakes place outside the female body in an external medium, generallywater. Fish, frog, starfish are some organisms that exhibit externalfertilization.

Disadvantages ofexternal fertilization:

In externalfertilization, eggs have less chances of fertilization. This can leadto the wastage of a large number of eggs produced during the process.

Further, there is anabsence of proper parental care to the offspring, which results in alow rate of survival in the progenies.