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?

Answer 1

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)