15337.Which one of the following is NOT a characteristic of phylum Annelida?
Ventral nerve cord
Closed circulatory system
Segmentation
Pseudocoelom
15339.The clam nervous system is composed of
labial palps
one pair of ganglia
two pairs of ganglia
three pairs of ganglia
15340.______ are devoid of respiratory, excretory and circulatory organs.
Threadworms
Sponges
Tapeworms
Liver fluke
15343.Which one of the following animals shows discontinuous distribution?
Green muscles
Bats
Lung fishes
Pacific salmons
15344.The radially symmetrical cnidarians have a ______ body in two distinct layers
sac-like
bilateral
flattened
symmetrical
15345.The cells absent in gastrodermis of Hydra are
Gland cells
Stinging cells
Nutritive cells
Nerve cells
15348.Which statement is correct regarding reptiles, birds, and mammals?
Evolved from a common ancestor
Embryos are surrounded by a fluid-filled sac called amnion
Outer covering is largely watertight.
All of the above
15349.What is common between kiwi, penguin and ostrich?
They are running birds.
They are flightless birds.
They are migratory birds.
They have four toes.
15352.Class bivalvia is characterized by
absence of gills
absence of head
coiled shell
presence of tentacles around mouth