The structure marked ‘X’ in the given diagram is:

1. used in generating water current in sponges
2. a cell used for capturing prey in Cnidarians
3. a sticky cell used for anchorage in comb jellies
4. an excretory and osmoregulatory cell in flatworms
Subtopic:  Phylum Ctenophora & Platyhelminthes |
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Radially symmetrical animals:
1. Are all triploblastic
2. Tend to be sessile and passively floating
3. Have a definite head and a brain
4. Have an anterior and a posterior end

Subtopic:  Basis of Classification |
 79%
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Identify the incorrectly matched pair:
1. Radula – Molluscs
2. Malpighian tubules– Insects
3. Choanocytes– Sponges
4. Cnidocytes – Ctenophora
Subtopic:  Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes |
 85%
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The lungs shown in the given diagram belong to the respiratory system of:

1. Amphibians 2. Reptiles
3. Birds 4. Mammals
Subtopic:  Study of Aves & Mammals |
 74%
From NCERT
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Perhaps the biggest reason for the enormous success of Arthropods is?

1. Chitinous exoskeleton 2. Diverse appendages
3. Respiration by tracheoles 4. Internal fertilization
Subtopic:  Phylum Arthropoda |
 62%
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In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct? 

Genus Name Two Characters Phylum
1. Pila (i)
(ii)
Body segmented
Mouth with Radula
Mollusca
2. Asterias (i)
(ii)
Spiny skinned
Water Vascular System
Echinodermata
3. Sycon (i)
(ii)
Pore bearing
Canal system
Porifera
4. Periplaneta (i)
(ii)
Jointed appendages
Chitinous exoskeleton
Arthropoda
Subtopic:  Phylum Mollusca |
 79%
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Which one of the following is a matching set of a phylum and its three examples?
1. Cnidaria- Bonellia, Physalia, Aurelia
2. Platyhelminthes- Planaria, Schistosoma, Enterobius
3. Mollusca- Loligo, Teredo, Octopus
4. Porifera- Spongilla, Euplectella, Pennatula

Subtopic:  Phylum Mollusca |
 64%
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Identify the incorrectly matched pair:
1. Obelia Metagenesis
2. Planaria Free living with high regeneration capacity
3. Ancylostoma Acoelomate
4. Nereis Parapodia
Subtopic:  Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes | Phylum Aschelminthes | Phylum Annelida |
 85%
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Consider the two statements:
I. The similarity between notochord and stomochord is due to convergent evolution.
II. Both arise from a common ancestry and exhibit homology.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect

Subtopic:  General Introduction: Vertebrates & Agnatha |
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Identify the incorrectly matched pair:

Phylum

Characteristic

1.

Porifera

Water vascular system

2.

Ctenophora

Bioluminescence

3.

Molluska

Radula

4.

Annelida

Closed circulatory system

Subtopic:  Phylum Porifera |
 76%
From NCERT
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