Which of the following developed for the first time in Annelids?

(1) Cephalization

(2) Development of a true coelom

(3) Metameric segmentation

(4) Both 2 and 3

Subtopic:  Phylum Annelida |
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Consider the following characters:

I. Air bladder

II. Operculum

III. Viviparity

The characters present in bony fishes include:

1. I, II and III 2. I and III only
3. I and II only 4. II and III only
Subtopic:  Comparative study of Cartilagenous & Bony Fishes |
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Homeothermy is exhibited by:

1. All amniotes

2. Birds and Mammals

3. All deuterostomes

4. Reptiles and Mammals

Subtopic:  Study of Aves & Mammals |
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Consider the following characteristics of Porifers. Which of these can be regarded as synapomorphies of Porifera?

1. Collared cells called as choanocytes

2. Canal system with pores (ostia) in body wall

3. Mineral spicules

4. High cellular mobility and totipotency

Subtopic:  Phylum Porifera |
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Identify the incorrect statement:

1. Medusa of Scyphozoans are called as jelly fishes.

2. Ctenophores are the largest animals that move with the help of cilia.

3. Flat worms that have a digestive cavity, have an incomplete gut.

4. Nematodes are covered with thick cuticle that does not moult.

Subtopic:  Phylum Ctenophora & Platyhelminthes | Phylum Aschelminthes |
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Match Nematode with their common names and choose answer from codes given below:

 

Nematode

 

Common names

I.

Ancylostoma duodenale

1.

Pin worm

II.

Enterobius vermicularis

2.

Filaria worm

III.  

Trichuris trichiura

3.

Loa loa

IV.

Dracunculus medinensis    

4.

Whip worm

V.

Onchocerca volvulus

5.   

Hook worm

VI.

Wuchereria bancrofti

6.

Guinea worm

Codes:

 

I.

II.

III.

IV.

V.

VI.

1.   

5       

1      

4      

6      

3      

2

2.

5

4

3

6

1

2

3.

5

3

4

1

6

2

4.

5

6

4

3

1

2

Subtopic:  Phylum Aschelminthes |
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What is the most important reason for the immense success of arthropods?

1. Chitinous exoskeleton

2. Uricotelic nature

3. Compound eye

4. Multipurpose appendages

Subtopic:  Phylum Arthropoda |
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What is not true for a generalized mollusc?

1. Body segmented into head, visceral mass and foot.

2. A rasping tongue like organ – radula present.

3. Mantle cavity with gills

4. Excretory structures – nephridia

Subtopic:  Phylum Mollusca |
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How many of the characters given below are true for echinoderms?

I. An endoskeleton of calcareous ossicles
II. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical.
III. They are triploblastic and coelomate animals.
IV. Digestive system is complete.
V. Water vascular system
VI. Sexual reproduction, internal fertilization, and direct development.


1. 3
2. 4
3. 5
4. 6

Subtopic:  Phylum Echinodermata |
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Which of the following is not seen in hemichordates?

1. A tripartite body organization

2. Stomochord

3. Rudimentary notochord

4. Proboscis gland

Subtopic:  Phylum Hemichordata |
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