1.  Bilateral sysmmetry and exoskeleton

2.  Shell and non segmented body

4.  A mantle and gills

1.  Star fishes

2.  Chondricthyes

4.  Flying fishes

1.  Radial symmetry

2.  Asymmetry

4.  Biradial symmetry

1.  Acoelom

2.  Pseudocoelom

4.  None of these

1.  Hydra

3.  Obelia

4.  Planaria

1.  Newts

2.  Lung-fishes

4.  Salamanders

1.  Struhio

3.  Cassowary

4.  Emu

1.  Platypus

2.  Bat

4.  Lemur

1.  Female cockroach-anal cerci

3.  Female asaris-sharply curved posterior end

4.  Male frog-a copulatory pad on the first digit of the hind limb

1.  Thyroid

2.  Parathyroid

4.  Posterior pituitary