Download App

BIOLOGY Case study (4 Marks)

PART - 1 - Unit I : CH - 4 Animal Kingdom · Gujarat Board (GSEB) STD 11 Science (GSEB - English Medium). 2 questions.

Questions

Case study (4 Marks)

Take a timed test

2 questions · self-marked practice — reveal the answer and mark yourself.

Question 14 Marks
Write any four differences between cartilaginous fishes and bony fishes.
Answer
Differences between Cartilaginous Fishes and Bony Fishes:
Cartilaginous FishesBony Fishes
Their endoskeleton is made of cartilage.Whereas the endoskeleton of these fish is made of bones.
There is a lack of Air bladderAir bladder is found.
Gill slits are not covered with operculum.Gill slits are covered by operculum.
Placorid scales are found on the skinWhereas Cycloid or Ctenoid scales are found on their skin.
Example: Scoliodon, Pristis.Example : Hippocampus, Exocoetus.
View full question & answer→
Question 24 Marks
Write any four differences between Agnatha and Gnathostomata.
Answer
Difference between Agnatha and Gnathostomata:
AgnathaGnathostomata
True jaws are absent in themTrue jaws present.
Paired appendages are absentPaired appendages are found.
Notochord is present till adulthoodThe notochord is transformed into the vertebral column.
Two semi-circular canals are found in the internal earThe number of semilunar tubes is three
View full question & answer→
Generate Paper FreeAll PART - 1 - Unit I : CH - 4 Animal Kingdom topics