Chondrichthyes Flashcards
1
Q
Their body shape is and they have
A
Streamlined and cartilaginous endoskeleton
2
Q
The mouth and teeth are
A
The mouth is ventrally located and teeth are backwardly directed
3
Q
It’s gill slits are present without
A
Operculum
4
Q
Their scales are
A
Minute placoid scales (skin is tough)
5
Q
Jaws are ____ which makes them ______
A
Powerful which makes them strong predators
6
Q
Due to absence of ____ it’s body must be swimming constantly to avoid sinking
A
Air bladder
7
Q
Their heart is
A
2 chambered (1 Artiole and 1 Ventricle)
8
Q
Male fish have
A
Clasper which releases sperm into the female’s body
9
Q
Fertilisation and development is
A
F - Internal
D - Oviparous
10
Q
Examples
A
Pristis (saw fish)
Carcharadon ( great white Shark)
Trygon (sting ray)
11
Q
The one that has a high sense of smell like dogs
A
Scoliodon (dogsfish)
