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Question

1) how can we say that fish exhibt external fertilisation/
2) give reason for the following
   the tearm metamorphis is not used while describing human development?


Solution

1)FISH EXHIBITS EXTERNAL FERTILIZATION SINCE IT LAYS EGGS WHICH GET FERTILIZED WITH THE MALE FISHSPERMS INSIDE THE WATER OUTSIDE THE FEMALE FISH'S BODY 2) INTRODUCTION:Metamorphosis is the transformation of the larva into adult through drastic changes. Meta means -beyond ;morphe means -form. Example are frog,insects etc. THE TERM METAMORPHOSIS IS NOT USED WHILE DESCRIBING HUMAN DEVELOPMENT BECAUSE OF THE FOLLOWING REASONS: *)Humans belongs to viviparous category (directly give birth to young ones) *)Only internal fertilization takes place(zygote & development of foetus takes place inside inside the mothers womb or uterus)

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