Which of the following makes sponges different from metazoan?
diploblastic
sedentary
choanocytes
acoelomate
The metazoans, without tissue grade of organisation, are called
parazoa
protozoa
eumetazoa
deuterostemia
The organisms attached to the substratum,generally, possesses
radial symmetry
one single opening of digestive canal
asymmetrical body
cilia on surface to create water current
Which of the following is not diploblastic?
porifera
cnideria
nematoda
ctenophora
Which of the following phylum includes largest number of species?
annelida
arthropoda
platyhelminthes
Which of the following pairs is correctly matched?
uricotelism - aquatic habitat
parasitism - intra-specific relationship
streamlined body - aquatic adaptation
excessive perspiration - xeric adaptation
Animals with radial symmetry in adult and bilateral symmetry in larva are
annelids
coelenterates
echinoderms
Flatworms and ribbonworms have
bilateral symmetry
organ level of organization
presence of mesoderm
all of these
Contractile vacuole is absent in
sporozoa
sarcodina
flagellata
ciliata
The scientist who suggested that in about 45 days the older cells of Hydra are replaced by new cells was
Brien
Trembly
Spemann
Linnaeus