Chondrichthyes

Question 1

In vertebrate they come under ___ and under super class ____
(Chondricthyes)

Answer 1

Gnathastomata (w jaws)
Pisces bear (fins)

Question 2

Habitat
Chondrichthyes

Answer 2

Marine

Question 3

Body
Chondrichthyes

Answer 3

Streamlined w cartilagenous endoskeleton

Question 4

Mouth
Chondrichthyes

Answer 4

Ventral

Question 5

Notochord fate
Chondrichthyes

Answer 5

Persistent throughout life

Question 6

Chondrichthyes
Gill slits

Answer 6

Separate without operculum(gill cover)

Question 7

Skin of chondrichthyes

Answer 7

Tough w minute placoid scales

Question 8

Chondrichthyes Teeth are modified w
And directed towards

Answer 8

Placoid scales
Backward

Question 9

Are chondrichthyes predaceous

Answer 9

Yes

Question 10

Presence of air bladder in chondrichthyes?
Consequences

Answer 10

No
Swim continuously

Question 11

Heart of chondrichthyes

Answer 11

2 chamb

Question 12

Electric organs present in

Answer 12

Torpedo

Question 13

Poison string in

Answer 13

Trygon (sting ray)

Question 14

Blood of chondrichthyes

Answer 14

Cold (poikilothermous)

Question 15

Reproduction in chondrichthyes

Answer 15

Dioecious
Internal fert
Viviparous

Question 16

Chondrichthyes
In males, pelvic fins bear

Answer 16

Claspers

Question 17

Scoliodon

Answer 17

Dog fish
Chondrichthyes

Question 18

Pristis

Answer 18

Saw fish

Question 19

Carcharodon

Answer 19

Great white fish

Question 20

Trygon

Answer 20

Sting ray
Chondrichthyes