Class Cyclostomata
Trending Questions
Q.
Number of gill slits in cyclostomes is
6-15 pairs
9-10 pairs
15-30 pairs
5-16 pairs
Q.
Jawless, exclusive marine bottom dwelling ectoparasites with cartilaginous vertebral column are grouped under the class:
Cephalochordata
Urochordata
Cyclostomata
Osteichthyes
Q. Which one of the following pairs of animals comprises 'Jawless fishes'?
- Lampreys and eels
- Lampreys and hagfishes
- Mackerels and rohu
- Guppies and hagfishes
Q. Choose the correct statement.
- All Pisces have gills covered by an operculum.
- All mammals are viviparous.
- All cyclostomes do not possess jaws and paired fins.
- All reptiles have a three chambered heart.
Q. Members of agnatha exhibit________
- sucking mouth with jaws
- migration to marine water
- similar exoskeleton like fishes
- similar circulatory system as that of earth worm
Q. Class cyclostomata includes all .
- jawed vertebrates
- jawed invertebrates
- jawless vertebrates
- jawless invertebrate
Q. Choose the correct statement.
- Starfish is radially symmetrical with lateral line system
- Jellyfish is radially symmetrical with polyploid body form
- Lamprey is bilaterally symmetrical with circular jawless mouth which is used for sucking
- Silverfish is bilaterally symmetrical and marine
Q. Choose the correct statement.
- All Pisces have gills covered by an operculum
- All mammals are viviparous
- All cyclostomes do not possess jaws and paired fins
- All reptiles have a three-chambered heart
Q. A marine jawless fish, which lays eggs in fresh water and whose larvae after metamorphosis return to the ocean is :
- Eptatretus
- Petromyzon
- Myxine
- Neomyxine
Q. The vertebral column is cartilaginous in:
- Osteichthyes
- Cyclostomes
- Urochordates
- Cephalochordates