CBSE
Multiple Choice QuestionsThe excretory material of bony fish is:
urea
protein
ammonia
amino acid
All worms are :
triploblastic
segmented
endo-parasites
free - living
Which insect is useful for us ?
Periplaneta
Musca
Bombyx
Mosquitoes
Class Crustacea differ from Insecta in having:
two pairs of antennae
jointed foot
chitinous cuticle
none of these
Pearl oyster is a mollusc which belongs to class :
Cephalopoda
Pelecypoda
Scaphopoda
Gastropoda
Which of the following is not found in Hydra ?
Epithelio-muscular cells
Cnidocyte
Choanocyte
Nerve cells
Body cavity of adult Ascaris is :
haemocoel
amphicoel
pseudocoel
schizocoel
Food storage in Leucosolenia occur by :
ostia
osculum
thesocyte
spongocoel
Which of the following symmetry is found in adult sea-anemone ?
Radial
Biradial
Bilateral
Spherical
Which of the following character is presence essentialy in chordates ?
Ventral spinal chord
Dorsal heart
Pharyngeal gill slits
Blood flow in forward direction in ventral blood vessels
