Question

describe the general characters of chondricthyes

Answer 1

Hyyy

Here is a short answer

Chondrichthyes are fishes that lack bone. Instead, the skeleton is composed of cartilage that is partly calcified. The group comprises two subclasses: Elasmobranchii and Holocephali. The elasmobranchs include sharks and rays of which there are more than 800 species, whereas the Holocephali is a much smaller group of about 40 species.

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Answer 2

****Heyy friend here is ur answer****

Chondricthyes is a class which comes under PISCES.
Characters:-

1) Notochord persist throughout life.
2) Habitat is marine.
3) Exoskeleton has Placoid scales.
4) Endoskeleton is Cartilagenous.
5) Mouth is on ventral side.
6) 5-7 pairs of gill slits are present for respiration.
7) Opernaculam (it is a cover on the gills) is absent.
8) Heterocercal type of tail is present.
9) Liver is bilobed.
10) Fertilization is Internal.
11) They are viviparous.
12) Excreatory waste is UREA.

E.g. 1) Scoliodon
2) Trygon
3) Pristis
4) Torpedo
5) Chimaera
6) Carcharodon

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