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प्रश्न
List three features that characterise bony fishes.
उत्तर
- These fishes have bony endoskeleton.
- The skin is covered by ganoid, cycloid or ctenoid scales.
- Gills are covered by an operculum.
- They are ammonotelic.
- They have mesonephric kidneys.
- External fertilization is seen.
संबंधित प्रश्न
“All vertebrates are chordates but all chordates are not vertebrates.” Justify the statement.
How important is the presence of air bladder in Pisces?
What are the modifications that are observed in birds that help them fly?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Four chambered heart is present in ______.
Which of the following is not correctly paired?
Which of the following is an egg laying mammal?
Pneumatic bones are seen in ______.
List the features that all vertebrates show at some point in their development.
List the functions of air bladder in fishes.
List the unique features of bird’s endoskeleton.
A and B are respectively represents?
Give the characteristic features of the following citing one example.
Urochordata and cephalochordata
Give three major differences between chordates and non-chordates and draw a schematic sketch of a chordate showing those features.
