CBSE
chloragogen cells help in
respiration
reproduction
circulation
nutrition
Chloragogen cells of earthworms are analogous to vertebrate
lungs
liver
gut
kidneys
'Sea fan' belongs to
Coelenterata
Porifera
Echinodermata
Mollusca
Which of the following character is present essentialy in chordates
Ventral spinal chord
Dorsal heart
Pharyngeal gill slits
Blood flow in forward direction in ventral blood vessels
In contrast to annelids the platyhelminthes show
radial symmetry
presence of pseudocoel
bilateral symmetry
absence of body cavity
Class Crustacea differs from lnsecta in having
two pairs of antennae
jointed foot
chitinous cuticle
none of the above
Food storage in Leucosolenia occur by
ostia
osculum
thesocyte
spongocoel
Trochophore is the larva of
Neopilina
Chiton
Pila
All of these
Mantle, foot and shell are the characteristics of
Nautilus
Echinus
Limulus
Euplectella
Number of cranial nerves in frog
10 pairs
9 pairs
12 pairs
none of these