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.

Subtopic: Β Phylum Chordata |
Β 82%
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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

Subtopic: Β Comparative study of Cartilagenous & Bony Fishes |
Β 78%
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Which of the following animals exhibit all these characters – bilateral symmetry, triploblastic, segmented and eucoelomate?

1.  Echinoderms

2.  Roundworms

3.  Molluscs

4.  Annelids

Subtopic: Β Phylum Annelida |
Β 83%
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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

Subtopic: Β General Introduction: Vertebrates & Agnatha |
Β 93%
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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

Subtopic: Β Phylum Porifera |
Β 81%
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The central cavity of the sponges is known as

1.spongocoel

2.Ostia

3.Osculum

4.Gastro-vascular cavity

Subtopic: Β Phylum Porifera |
Β 91%
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The minute pores in the  body wall of the sponges is known as

1.spongocoel

2.Ostia

3.Osculum

4.Spicules

Subtopic: Β Phylum Porifera |
Β 87%
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Water canal is lined by

1.Spongin fibres

2.Choanocytes

3.Collar cells

4.Both 2 and 3

Subtopic: Β Phylum Porifera |
Β 86%
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Canal system in sponges helps in

1.Food gathering

2.Respiratory exchange

3.Removal of waste

4.All of the above

Subtopic: Β Phylum Porifera |
Β 99%
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In sponges, digestion is

1.Intercellular

2.Intracellular

3.Both inter and inter cellular

4.Gastric cavity

Subtopic: Β Phylum Porifera |
Β 74%
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