NEET : Multiple Choice Questions: Basis of Animal classification

 

1. In cellular level of  organisation,  cells are arranged in loose aggregation and have divison of labour  in
A. Porifera (sponges)
B. Platyhelminthes
C. Aschelminthes(roundwom)
D. Coelentreta
Answer : A Explanation 

2. In coelentrata, the arrangement of cell  is more complex & performing some function as
A. Cellular level of Organisation
B. Organ level of Organisation
C . Tissue leve Organisation
D. Organ system level of organisation 
Answer: C Explanation 

3. Organ Level of organisation  was first appeared in
A.Annelida  

B.Arthropoda
C.Platyhelmenthes

D.Aschelminnthes
Answer : C Explanation 

4. Match the list -
Level of               Phylum

organisation

A.Cellular     1. Porifera 
B.Tissue      2.Cnidaria
C.Organ      3.Platyhelminthes
D.Organ      4.Aschelminthes

System

              A.       B        C          D 

A.          1         2         3          4

B.          2         3         1          4

C.          4         3         2          1

D.         4          2         3          1

Answer : A Explanation

5. Which of the following statement is not correct.

A. In complete  digestive system, An Alimentary canal has a single openning

Which serve as both mouth and anus.

B.When the blood is pumped in network of blood vessel known as open circulatory system.

C. All the cells and tissue are directly bathed in blood in body cavity sinus.

D. A single opening in digestive system form incomplete digestive system.
Answer : A  Explanation

6. In Diploblastic animals,which of the following embryonic layer is are responsible for formation of all tissue or organs.

A. Mesoderm 

B. Ectoderm & Endoderm

C. Mesoderm  & Endoderm

D. Mesoderm & Ectoderm

Answer: A Explanation 

7. Which of the following phylum is / are Diploblastic.

A. Porifera

B. Coelentreta 

C. Ctenophora

D. All of the above.

Answer : D Explanation 

8. Triploblastic condition, In which all tissue and organs are developed from the ectoderm, Endoderm and mesoderm found from 

A. Porifera to Platyhelminthes

B. Porifera to ctenophora

C. Platyhelminthes to choradates

D. Fish to mammals.

Answer : C Explanation

9. Coelom is a space between 

A. Pelvic wall and bodywall

B. Body wall and gut

C. Pelvic wall and gut

D. Pelvic wall and abdomen

Answer : B Explanation

10. Coelom or body cavity is lined by 

A. Ecto - mesoderm

B. Endoderm

C. Mesoderm

D. Ectoderm

Answer : C Explanation

11. In which type of Coelom, body cavity is not lined by the mesoderm but present in form of scattered pouch .

A. A coelom

B. Pseudocoelom

C. Coelom

D. Entero coelom

Answer : B Explanation

13. Which of the following pair is not correct.

A.Acoelomate:

Platyhelminthes

B.Pseudocoelomate:

Aschelminthes 

C. Coelomate :Porifera

D. Acoelomate : Cnidaria

Answer : A Explanation

14. When a body is divided into identical left and right halves when passing a plane vertically than body is said to be 

A. Asymmetrical    

B. Bilateral  symmetrical

C. Radial symmetrical 

D. Iso Symmetrical

Answer : B Explanation

15. Bilateral symmetrical condition has been started from the 

A. Cnidaria 

B. Platyhelminthes 

C. Annelida

D. Aschelminthes

Answer : B Explanation

              

16. When a plane is passed from central axis of body and divided it into two equal halves called 

A. Asymmetrical    

B. Bilateral  symmetrical

C. Radial symmetrical 

D. Iso symmetrical

Answer : C Explanation

17. Redial symmetry is not present in 

A. Porifera 

B. Coelentreta 

C. Ctenophora 

D. Echinodermata

Answer : A Explanation

18. Sponges have 

A. Diploblastic 

B. Asymmetrical 

C. Cellular level of organisation 

D. All of the above

Answer : D Explanation

19. Consider the following features for the members of Aschelminthes and select the correct code 

1. Pseudocoelomate

2. Organ system level of organisation 

3. Acoelomate

4. Bilateral symmetrical 

5. Triploblastic 

A. 1,3,4,and 5

B. 1,2,4 and 5

C. 1,2,3 and 4

D. 2,3,4 and 5

Answers: B Explanation

20. First Coelomate animals belong to 

A. Annelida

B. Platyhelminthes 

C. Aschelminthes

D. Arthropoda

Answer : A Explanation

21. Which of the following features are first appeared in members of platyhelminthes.

A. Triploblastic and Bilateral symmetry

B. Organ level of system and Triploblastic

C. Organ level of system and Triploblastic 

D. Triploblastic , Bilateral symmetry and organ level of system

Answer : D Explanation

22. In which of the following phylum, the larva is bilateral symmetrical and adult is radial symmetrical.

A. Mollusca 

B. Echinodermata

C. Hemichordata

D. Ctenophora

Answer : B Explanation

23. Metameric segmentation in which external segments make correspondence to internal segments, found in 

A. Annelida

B. Platyhelminthes 

C. Aschelminthes

D. Arthropoda

Answer : A Explanation

24. Which of the following statement is not correct with respect to the Notochord.

A. It is rod like tubular structure present on dorsal side of body of choradates.

B. An animal  with the notochord is called as Choradates.

C. It is endodermal in origin.

D. Notochord is absent from Porifera to Echinodermata.

Answer: C A. Annelida

B. Platyhelminthes 

C. Aschelminthes

D. Arthropoda

Answer : A Explanation