Download App

STD 11 - 4. Animal kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 4. Animal kingdom1 Mark
MCQ
Air bladder is
  • ✓
    Hydrostatic organ of bony fishes
  • B
    Excretory organs of mammals
  • C
    Respiratory organs of birds
  • D
    Respiratory organ of reptiles
✓

Answer

Correct option: A.
Hydrostatic organ of bony fishes
a
Air bladder or swim bladder regulates buoyancy. Air bladder is absent in cartilaginous fishes (chondrichthyes) so those fishes have to swim continuously to avoid sinking. Air bladder is present in bony fishes.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from STD 11 - 4. Animal kingdom→STD 11 - 4. Animal kingdom — all question types→BIOLOGY STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Delete odd one:
→
What external changes are visible after the last moult of a cockroach nymph?
→
Which of the following is an accumulation and release centre of neurohormones?
→
Grouping of $ABO$ blood is based on the
→
Find out a set of common $N_2$ fixing fodder plants
→
Liquid endosperm in coconut is example of ...........
→
How does photosystem II maintain the continuous supply of electrons during electron transport system?
→
If the number of chromosomes, in the foot of fern embryo is  $8 $ what should be the number in its spores
→
Choose the correct option
→
Read the following table and choose the correct pair.

$I$. $DCMU$ Herbicide Inhibitor of non-cyclic electron transport

$II$. $PMA$ Fungicide Reduce transpiration

$III$. Colchicine Alkaloid Causes male sterility

$IV$. Soilrite Sodium alginate Encapsulation of somatic embryos

→