Which of the following pairs is correctly matched?
uricotelism - aquatic habitat
parasitism - intra-specific relationship
streamlined body - aquatic adaptation
excessive perspiration - xeric adaptation
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
The formation of canal system in sponges is due to
reproduction
porous walls
folding of inner walls
gastro-vascular system
Contractile vacuole is absent in
sporozoa
sarcodina
flagellata
ciliata
The metazoans, without tissue grade of organisation, are called
parazoa
protozoa
eumetazoa
deuterostemia
Which of the following is correct?
mollusca-bivalvia-pila
annelida-hirudinea-silver fish
mollusca-cephalopoda-octopus
arthropoda-arachinida-grasshopper
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 phylum includes largest number of species?
annelida
arthropoda
platyhelminthes
Choanocytes is an ascon type of canal system, which is lined by
porocyte
incurrent
apopyle
spongocoel
Choanocytes perform
excretion
nutrition
secretion of spicules
