Choose the correct option for the following statements:
$(i)$ Metamerism is a characteristic feature of $Annelida$ / $Arthropoda$.
$(ii)$ Internal buds in sponges are called $Gemmules$ / $Gemmi$.

Match the following columns and select the correct option:

Column $I$	Column $II$
$(a)$ Aptenodytes	$(i)$ Flying fox
$(b)$ Pteropus	$(ii)$ Angel fish
$(c)$ Pterophyllum	$(iii)$ Lamprey
$(d)$ Petromyzon	$(iv)$ Penguin

Diploblastic animals occur in:

Features common to the animals belonging to class-$Amphibia$ and class-$Reptilia$ are

Give an example of the following:
$(a)$ $A$ viviparous animal
$(b)$ $A$ fish possessing a poison sting
$(c)$ $A$ fish possessing an electric organ
$(d)$ An organ which regulates buoyancy
$(e)$ An animal which exhibits alternation of generation
$(f)$ An oviparous animal with mammary glands

$P$ - Assertion: Circulatory system is present in Annelids.
$Q$ - Reason: Circulatory system is absent in Aschelminthes.