Alimentary canal is not found in
apoda
cestoda
gastropoda
arachnida
Butterflies belong to the order
diptera
coleoptera
lepidoptera
hymenoptera
Flatworms and ribbonworms have
bilateral symmetry
organ level of organization
presence of mesoderm
all of these
Choanocytes perform
excretion
nutrition
reproduction
secretion of spicules
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
porous walls
folding of inner walls
gastro-vascular system
Which of the following pairs is correctly matched?
uricotelism - aquatic habitat
parasitism - intra-specific relationship
streamlined body - aquatic adaptation
excessive perspiration - xeric adaptation
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 are lowest 'multicellular grade' organisms?
sponges
coelenterates
prokaryotes
monerans
Which of the following makes sponges different from metazoan?
diploblastic
sedentary
choanocytes
acoelomate
