Which of the following would be a characteristic of the animal shown in the given diagram?

             

1. Excretory organ is the proboscis gland.

2. They migrate for spawning to fresh water.

3. Notochord is present only in the larval tail.

4. Parapodia are present for swimming.

All cyclostomes are ___________ on some fishes; paired fins are _________, cranium is ________ and circulation is _______ type.

1. Ectoparasites, Absent, Cartilaginous, Open

2. Endoparasites, Present, Bony, Closed

3. Ectoparasites, Absent, Cartilaginous, Closed

4. Ectoparasites, Present, Cartilaginous, Open

Which of the following animals exhibit all these characters – bilateral symmetry, triploblastic, segmented and eucoelomate?

1.  Echinoderms

2.  Roundworms

3.  Molluscs

4.  Annelids

What is incorrect regarding cyclostomes?

1.  They are ectoparasites on some fishes

2.  They have a circular mouth without jaws

3.  Circulation is of open type

4.  They are marine but migrate to fresh water for spawning

Which of the following is not true about Porifera

1.Cellular level of organisation

2.Radial symmetry

3.Tissue is absent

4.Canal system is present

The central cavity of the sponges is known as

1.spongocoel

2.Ostia

3.Osculum

4.Gastro-vascular cavity

The minute pores in the  body wall of the sponges is known as

1.spongocoel

2.Ostia

3.Osculum

4.Spicules

Water canal is lined by

1.Spongin fibres

2.Choanocytes

3.Collar cells

4.Both 2 and 3

Canal system in sponges helps in

1.Food gathering

2.Respiratory exchange

3.Removal of waste

4.All of the above

In sponges, digestion is

1.Intercellular

2.Intracellular

3.Both inter and inter cellular

4.Gastric cavity