Cyclostomata Flashcards
1
Q
All the members in this class are
A
Ectoparasites
2
Q
They are jawless but contains
A
Sharp blades in their circular mouth to suck muscles,blood and tissues
3
Q
They have ______ pairs of gill slits
A
6-15 pairs
4
Q
Since they are vertebrates they have
A
Cartilaginous V.C
5
Q
Cyclostomata are devoid of and type of circulation
A
Fins and scales
Closed type circulation
6
Q
They are marine but migrate
A
For spawning they migrate to fresh water
7
Q
The larva return to the sea after
A
Metamorphosis and after the mother dies
8
Q
Fertilisation and development
A
F- external
D- indirect (oviparous)
9
Q
Examples of cyclostomata
A
Petromyzon (Lamprey)
Myxine(Hagfish)
