The water canal system is found in:-

1. Echinus

2. Sycon

3. Balanoglossus

4. Ascidia

Correct flow water current in sponges is:-

1. Ostia $\to$Osculum$\to$Spongocoel$\to$Outside

2. Osculum$\to$Spongocoel$\to$Ostia$\to$Outside

3. Ostia$\to$Spongocoel$\to$Osculum$\to$Outside

4. Osculum$\to$Ostia$\to$Spongocoel$\to$Outside

Which of the following is the unique feature of mammal ?

1. Muscular diaphragm

2. Ear pinna

3. Mammary glands

4. All of the above 

Respiration in Balaenoptera takes place by :-

1. Gills 

2. Skin

3. Trachea

4. Lungs 

In which of the following Radula is absent ?

1. Sepia

2. Octopus

3. Pila

4. Echinus

Which of the following option is correct? 

See the following diagrams carefully and these animals are

1. Sycon, Leucosolenia

2. Hydra, Aurelia

3. Nereis, Hirudinaria

4. Fasciola, Taenia

Identify the following diagrams and these represent:

1. (a) radial symmetry, (b) bilateral symmetry

2. (a) bilateral symmetry, (b) radial symmetry

3. (a) asymmetrical, (b) radial symmetry

4. (a) bilateral symmetry, (b) asymmetrical

Endoskeleton of calcareous ossicles, external fertilization, adults shows radial symmetry, development indirect.

The above-given feature is true for:-

1. Echinus, Asterias

2. Pila, ophiura

3. Antedon, Aplysia

4. Pinctada, cucumaria

In Planaria, waste material of food digestion and Nitrogenous waste material removed from

1. Mouth and mouth

2. Body wall and body wall

3. Mouth and Flame-cell

4. Mouth and Body wall