All the following are present in sponges, except
1. Spicules
2. Choanocytes
3. A digestive tract
4. Sexual and / or asexual reproduction

Subtopic:  Phylum Porifera |
 86%
From NCERT
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Find out the correct match from the following table:-

 

Column-I

Column-II

Column-III

(i)

Radula

Rasping organ

Pila

(ii)

Hooks and suckers

Taenia

Annelida

(iii)

Tube feet

Asterias; Dentalium

Echinodermata

(iv)

Comb plates

Pleurobrachia; Aurelia

Ctenophora

1. (i) only 
2. (i) and (ii)
3. (iii) only
4. (ii) and (iii)

Subtopic:  Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes | Phylum Mollusca | Phylum Echinodermata |
 76%
From NCERT
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Excretory system is absent, sexes are separate,
fertilization is usually external this is correct for :

1. 2.
3. 4.
Subtopic:  Phylum Echinodermata |
 76%
From NCERT
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Select the correct option in respect of characteristics
of each group :-

 

Cyclostomes

Chondrichthyes

Osteichthyes

(i)

Marine

Marine, Fresh water

Marine

(ii)

Sucking mouth

Ventral mouth

Terminal mouth

(iii)

6-15 Pairs of Gills

5-7 Pairs of Gills

4 Pairs of Gills

(iv)

Placoid scales

Cycloid Scales

Ctenoid/ Ganoid

1. (i), (ii) are correct.
2. (i), (iii), (iv) are correct.
3. (ii), (iii) are correct.
4. (ii), (iii), (iv) are correct.

Subtopic:  General Introduction: Vertebrates & Agnatha | Comparative study of Cartilagenous & Bony Fishes |
 66%
From NCERT
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Read the following statements :

A. Mouth is located ventrally.
B. Notochord is persistent throughout life.
C. Gill slits are seperate and with operculum.
D. Air bladder are absent.

How many of the above statements are correct for given
figure :

1. Four.
2. Three.
3. Two.
4. One

Subtopic:  Comparative study of Cartilagenous & Bony Fishes |
 64%
From NCERT
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Mark the correct match with the group and its
characteristic?
1. Arthropoda  Compound eye and wings.
2. Mammalia  Viviparity.
3. Echinodermata  Calcareous endoskeleton.
4. Annelida  Fresh water and segmented body.

Subtopic:  Phylum Echinodermata |
 60%
From NCERT
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Which of the following chordata is characterised with marine habitat, external fertilization and direct development?

1. Petromyzon.

2. Antedon.

3. Hippocampus.

4. Scolodion.

Subtopic:  Super Class Pisces & its General Characteristics |
 56%
From NCERT
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The most distinctive feature of echinoderms is the presence of a water vascular system which helps in
(A) Locomotion
(B) Excretion
(C) Respiration
(D) Reproduction

1. (A) only
2. (B) & (C) only
3. (A), (B) & (C) only
4. (A), (B), (C) & (D)

Subtopic:  Phylum Echinodermata |
 65%
From NCERT
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Which of the following statement is incorrect with respect to vertebrates?
1. Vertebrates possess notochord during the embryonic period
2. Notochord is replaced by a cartilaginous or bony vertebral column in the adult
3. All vertebrates are chordates but all chordates are not vertebrates
4. Vertebrates have a dorsal muscular heart with two, three, or four chambers

Subtopic:  General Introduction: Vertebrates & Agnatha |
 79%
From NCERT
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What is true about Nereis, scorpion, cockroach and silver fish ? 
1. They all possess dorsal heart
2. None of them is aquatic
3. They all belong to the same phylum
4. They all have jointed paired appendages

Subtopic:  Phylum Annelida | Phylum Arthropoda |
 60%
From NCERT
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