Which one of the following categories of animals, is correctly described with no single exception in it?

1.	All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal).
2.	All bony fishes have four pairs of gills and an operculum on each side.
3.	All sponges are marine and have collared cells.
4.	All mammals are viviparous and possess diaphragm for breathing.

Match the name of the animal (Column I), with one characteristics (Column II), and the phylum/class (Column III) to which it belongs

A marine cartilaginous fish that can produce electric current is:

The diagram given below shows the germs layer. The animals having structures shown in the figures A and B are respectively called

In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:
1. Myotomes
2. Metameres
3. Proglottides
4. Comb plates

The phylum with exclusively marine animals is:

Which of the following is not a feature of birds?

Chordates are not characterized by:

Notochord is derived from embryonic:
1. Ectoderm
2. Mesoderm
3. Endoderm
4. Ectoderm and Mesoderm

Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm :
1. Cnidaria
2. Platyhelminthes
3. Mollusca
4. Aschelminthes