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  • 1(current)
Q. No.

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 |
 80%

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Approximately what percentage of existing animal species are invertebrates?

1. 20% 2. 50%
3. 70% 4. 95%
Subtopic:  Basis of Classification |
 73%

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In metamerism, there is serial repetition of unit subdivisions of:
I. Ectoderm products
II. Mesoderm products
III. Endoderm products

1. Only II 2. Only I and II
3. Only II and III 4. I, II and III
Subtopic:  Basis of Classification |
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Identify the correct statement:
1. All pseudocoelomates are protostomes
2. All bilaterally symmetrical animals have a coelom
3. All animals have at least a tissue grade organization
4. All radially symmetrical animals are diploblastic

Subtopic:  Basis of Classification |
 51%

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Match the following list of animals with their level of organization.

Division of Labour Animal
A. Organ level i. Pheritima
B. Cellular aggregate level ii. Fasciola
C. Tissue level iii. Spongilla
D. Organ system level iv. Obelia

Choose the correct match showing division of labour with animal example:

i ii iii iv
1. B C D A
2. B D C A
3. D A B C
4. A D C B
Subtopic:  Phylum Porifera | Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes | Phylum Aschelminthes | Phylum Annelida | Phylum Arthropoda | Phylum Mollusca | Phylum Echinodermata | Phylum Hemichordata | General Introduction: Vertebrates & Agnatha |
 87%

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Which of the following is not a character of deuterostomes?

1. Radial cleavage                       
2. Schizocoelous coelom
3. Indeterminate cleavage           
4. Blastopore forms anus
Subtopic:  Basis of Classification:I | Basis of Classification |

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Parazoa is a taxon at the base of the phylogenetic tree of the animal kingdom and includes the most primitive forms, characterized by not having proper tissues. The phylum/phyla included in this taxon will be:

I. Porifera II. Cnidaria III. Ctenophora
 
1. Only I 2. Only II and III
3. Only I and II 4. I, II and III
Subtopic:  Phylum Porifera | Basis of Classification |
 81%
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