Class Cyclostomata

Q. The body of hemichordates is divided into

1. head, muscular foot and visceral hump
   
2. proboscis, collar and trunk
3. head, thorax and abdomen
4. proboscis and trunk

Q. Select the incorrect statement about cyclostomes?

1. Elongated body bearing 6-15 pairs of gill slits
2. Body is devoid of scales and paired fins.
3. Circulation is of closed type.
4. Circular mouth with jaws and teeth.

Q. Choose the correct statement.

1. All Pisces have gills covered by an operculum.
2. All mammals are viviparous.
3. All cyclostomes do not possess jaws and paired fins.
4. All reptiles have a three chambered heart.

Q.

Which group of chordates possess sucking and circular mouth without jaws?

Q. Which of the following possesses poison sting and belongs to the class chondrichthyes?

1. Labeo
2. Myxine
3. Clarias
4. Trygon

Q. __________ migrates to fresh water for spawning.

1. Eel
2. Petromyzon
3. Exocoetus
4. Clarias

Q.

Number of gill slits in cyclostomes is

1. 6-15 pairs

2. 9-10 pairs

3. 15-30 pairs

4. 5-16 pairs

Q. Cyclostomes have

1. paired fins
2. cranium
3. mouth with jaws
4. scales

Q. Maximum number of gill slits are present in

1. shark
2. lamprey
3. rohu
4. both a and b

Q.

Are Chondrichthyes cold-blooded?

Q.

What are the two groups of fish?

Q. Select the Taxon mentioned that represents both marine and fresh water species:

1. Echionoderms
2. Ctenophroa
3. Cehalocoradata
4. Cnidaria

Q.

Do all fish have gills covered by operculum?

Q.

Are humans triploblastic?

Q.

Do Sharks have operculum?

Q. Lamprey is

1. with paired fins
2. not parasitic
3. jawless vertebrate
4. jawed fish

Q. Mention the differences between cartilaginous and bony fishes.​

Q. Vertebrates without jaws are included in the class:

1. Agnatha
2. Cyclostomata
3. Hemichordata
4. Chondrichthyes

Q.

Why are cyclostomes called agnatha?

Q. Which of the following class does not come under division Gnathostomata?

1. Cyclostomata.
2. Chondrichthyes.
3. Pisces.
4. Osteichthyes.

Q. Name a reptile which does not possess limbs.​

Q. Lamprey is

1. not parasitic
2. jawless vertebrate
3. jawed fish
4. with paired fins

Q.

Jaw-less fishes belong to which group

1. Chondrichthyes

2. Osteichthyes

3. Agnatha

4. Pisces

Q. Vertebrates without jaws are included in the class:

1. Agnatha
2. Cyclostomata
3. Hemichordata
4. Chondrichthyes

Q. Cyclostomes have

1. paired fins
2. cranium
3. mouth with jaws
4. scales

Q. Glycolate induces opening of stomata in:

1. Low $C{O}_2$ conc.
2. High $C{O}_2$
3. $C{O}_2$ absent
4. Presence of oxygen

Q. Class cyclostomata includes all .

1. jawed vertebrates
2. jawed invertebrates
3. jawless vertebrates
4. jawless invertebrate

Q. ntexplain the digestion part in urochordates with diagramn

Q.

Are cnidarians diploblastic or triploblastic?

Q.

Identify the class of Bufo.