FISHES

The oldest proofs of the existence of fishes are from:
1. Paleozoic
2. Mezozoic
3. Cenozoic
Gas bladder
1. helps keeping the body in a particular position
2. unweights the fish body
3. unweights the fish body and helps keeping the body in a particular position
Stream organ ensures
1. orientation in the environment
2. unweights the fish body
3. orientation in the environment; it is noticeable as the lateral line
Which of these fins are not geminate (pair)?
1. pectoral
2. caudal
3. pelvis
Upper fast flowing sections of rivers (mountain streams) belong to:
1. trout zone
2. grayling zone
3. barbel zone
Originally wild fish living in rivers, nowadays domesticated in fishponds:
1. common carp
2. bream
3. crucial carp
Our biggest fish is:
1. river perch
2. big catfish
3. common zander
Which fishes have the apidose fin?
1. Salmonidae
2. Cyprinidae
3. Percidae
Fish similar to carp, which does not have whiskers
1. crucial carp
2. Cyprinidae
3. Percidae
Fishes breath with
1. gill
2. lungs
3. both gill and lungs