Animals with radial symmetry in adult and bilateral symmetry in larva are
annelids
coelenterates
echinoderms
platyhelminthes
The metazoans, without tissue grade of organisation, are called
parazoa
protozoa
eumetazoa
deuterostemia
Choanocytes is an ascon type of canal system, which is lined by
porocyte
incurrent
apopyle
spongocoel
Which of the following pairs is correctly matched?
uricotelism - aquatic habitat
parasitism - intra-specific relationship
streamlined body - aquatic adaptation
excessive perspiration - xeric adaptation
Contractile vacuole is absent in
sporozoa
sarcodina
flagellata
ciliata
Which of the following phylum includes largest number of species?
annelida
arthropoda
The scientist who suggested that in about 45 days the older cells of Hydra are replaced by new cells was
Brien
Trembly
Spemann
Linnaeus
The formation of canal system in sponges is due to
reproduction
porous walls
folding of inner walls
gastro-vascular system
Flatworms and ribbonworms have
bilateral symmetry
organ level of organization
presence of mesoderm
all of these
Radial symmetry is, usually, exhibited in animals which
live in water
have ciliary mode of feeding
are attached to the substratum
have one opening of alimentary canal
