Which among the following have scales?
$(i)$ Amphibians
$(ii)$ Pisces
$(iii)$ Reptiles
$(iv)$ Mammals

You are given leech,Nereis,Scolopendra,prawn,and scorpion; all have a segmented body organization. Will you classify them in one group? If no,give the important characters based on which you will separate these organisms into different groups.

State reasons for the following:
$(a)$ Protists have appendages like cilia or flagella.
$(b)$ Angiosperms are called so.
$(c)$ Fish have scales on their body.

Which one is a true fish?

Which among the following have scales?
$(i)$ Amphibians
$(ii)$ Pisces
$(iii)$ Reptiles
$(iv)$ Mammals

Identify and write the names of the parts labeled as $A, B, C$ and $D$ in the given figure of a seahorse in your answer book.