Metamorphosis of insects is regulated through ______________ hormone.
Pheromone
thyroxine
ecdysone
All of these
Colem derived from blastocoel is known as ______________.
enterocoelom
schizocoelom
pseudocoelom
haemocoelom
The organisms attached to the substratum generally, possess ________________.
radial symmetry
one single opening of digestive canal
asymmetrical body
cilia on surface to create water current.
______________ is a molluscan group which possess eyes resembling vertebrate eyes.
Bivalvia
Gastropoda
pelecypoda
cephalopoda
Blood of pheretima is ______________.
blue with haemocyanin in corpuscles
blue with haemocyanin in plasma
red with haemocyanin in corpuscles
red with haemocyanin in plasma
Closed circulatory system occurs in _______________.
snail
cockroach
cuttle fish
Bi radial symmetry and lack of cnidoblasts are the characteristics of ____________.
starfish and sea anemone
ctenoplana and beroe
Aurelia and paramecium
Hydra and starfish
Organ pipe coral is a ____________.
Tubipora
Astraea
Helipora
Fungia
Male and female cockroaches can be distinguished externally by the presence of ______________.
anal styles in male
anal cerci in female
anal style and antennae in females
both (b) and (c)
