Identify the odd one out.

Assertion $A$: Fishes possess gills,fins,and scales.
Reason $R$: Fishes are a form of taxon.
Which option is correct for Assertion $A$ and Reason $R$?

Select the correct option based on the sex of the organisms.
Unisexual organisms $\quad\quad$ Bisexual organisms

Match the following columns regarding the number of heart chambers in different animals:

Column-$I$	Column-$II$
$(a)$ Two-chambered	$(i)$ Peacock
$(b)$ Three-chambered	$(ii)$ Labeo
$(c)$ Incomplete four-chambered	$(iii)$ Ichthyophis
$(d)$ Four-chambered	$(iv)$ Lizard

The echinoderms,hemichordates,and chordates had which of the following larvae as a common ancestral form?

Which of the following characteristics are $NOT$ common to both Aves (birds) and Mammalia (mammals)?
$I$ - Homeothermic (warm-blooded) animals.
$II$ - Respire through lungs.
$III$ - Possess a four-chambered heart.
$IV$ - Dioecious (sexes are separate).
$V$ - Possess hair on the skin.
$VI$ - Show internal fertilization.
$VII$ - Possess teeth.