Differentiate between Chondrichthyes and Oste | vedclass

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(N/A)       Chondrichthyes    Osteichthyes        $(1)$ Exclusively marine.    $(1)$ Both marine and freshwater.        $(2)$ Skin covered with placoi

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(N/A)       Chondrichthyes    Osteichthyes        $(1)$ Exclusively marine.    $(1)$ Both marine and freshwater.        $(2)$ Skin covered with placoid scales.    $(2)$ Skin covered with cycloid or ctenoid scales.        $(3)$ Caudal fin is heterocercal.    $(3)$ Caudal fin is homocercal.        $(4)$ Endoskeleton is cartilaginous.    $(4)$ Endoskeleton is bony.        $(5)$ $5-7$ pairs of gills; operculum absent.    $(5)$ $4$ pairs of gills; operculum present.        $(6)$ Fertilization is internal.    $(6)$ Fertilization is external.        $(7)$ Mouth is ventral.    $(7)$ Mouth is terminal.        $(8)$ Examples: $Scoliodon$ (shark),$Pristis$ (sawfish).    $(8)$ Examples: $Hippocampus$ (sea horse),$Labeo$ (rohu).

Differentiate between Chondrichthyes and Osteichthyes.

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Chondrichthyes	Osteichthyes
$(1)$ Exclusively marine.	$(1)$ Both marine and freshwater.
$(2)$ Skin covered with placoid scales.	$(2)$ Skin covered with cycloid or ctenoid scales.
$(3)$ Caudal fin is heterocercal.	$(3)$ Caudal fin is homocercal.
$(4)$ Endoskeleton is cartilaginous.	$(4)$ Endoskeleton is bony.
$(5)$ $5-7$ pairs of gills; operculum absent.	$(5)$ $4$ pairs of gills; operculum present.
$(6)$ Fertilization is internal.	$(6)$ Fertilization is external.
$(7)$ Mouth is ventral.	$(7)$ Mouth is terminal.
$(8)$ Examples: $Scoliodon$ (shark),$Pristis$ (sawfish).	$(8)$ Examples: $Hippocampus$ (sea horse),$Labeo$ (rohu).