Water exits from a sponge through the:

1. Spicule 2. Choanocyte
3. Amoebocyte 4. Osculum

Subtopic:  Phylum Porifera |
 89%
From NCERT
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Which one of the following is not a poisonous snake?

1. Cobra 2. Viper
3. Python 4. Krait
Subtopic:  Study of Reptilia |
 75%
From NCERT
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Body cavity is the cavity present between body wall and gut wall. In some animals, the body cavity is not lined by mesoderm. Such animals are called

1. Acoelomate 2. Pseudocoelomate
3. Coelomate 4. Haemocoelomate
Subtopic:  Phylum Aschelminthes |
From NCERT
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Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:

1. Planaria 2. Pheretima
3. Periplaneta 4. Pinctada
Subtopic:  Phylum Ctenophora & Platyhelminthes |
 86%
From NCERT
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The number of correct statements regarding hemichordates from the given is:

I.  A stomochord is present in the collar region
II.  Circulation is of open type
III.  Excretory organ is proboscis gland
IV.  Development is indirect
 
1. 1 2. 2
3. 3 4. 4
Subtopic:  Phylum Hemichordata |
 67%
From NCERT
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Icthyophis is a/an:

1. Tunicate chordate 2. Flightless bird
3. Limbless amphibian 4. Egg-laying mammal
Subtopic:  Study of Amphibians |
 89%
From NCERT
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Which of the following is not an Arthropod characteristic?

1. Jointed appendages 2. Periodic molting
3. Closed circulation 4. Articulated exoskeleton
Subtopic:  Phylum Arthropoda |
 81%
From NCERT
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In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk?

1. Hemichordates 2. Urochordates
3. Cephalochordates 4. Vertebrate chordates
Subtopic:  Phylum Hemichordata |
 93%
From NCERT
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A water vascular system is characteristically present in:

1. Annelids 2. Porifers
3. Echinoderms 4. Cartilaginous fishes
Subtopic:  Phylum Echinodermata |
 87%
From NCERT
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In Amphibia:

I: Skin is moist without scales
II: A tympanum represents the ear
III: Fertilization is external
 
1. Only I and II are correct 2. Only I and III are correct
3. Only II and III are correct 4. I, II, and III are correct
Subtopic:  Study of Amphibians |
 85%
From NCERT
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