Chordata

Zoology (Optional) By Dheeraj Sharma :  

Dheeraj Sharma has been dedicated himself in the field of education to fulfill his aspiration of making quality education & content accessible to all. 

He has been teaching on Exams Exclusive. He was the first one who make the Zoology (Optional for CSE) course free & accessible to all and also guide thousands of aspirants online.

Chordates are animals characterized by the presence of notochord at some stage during their development. Members possess a hollow nerve cord and pharyngeal gill slits.

The general characteristic features of Chordates are : 

• They are bilaterally symmetrical, triploblastic, and coelomate with the organ-system level of organization. 
• They hold a post-anal tail.
• The body includes a closed circulatory system. 
• In some members of Phylum Chordata, the notochord is present only in the larval tail, and in some, it is present throughout their life from head to tail region. 
• Chordates have many sub-divisions and Protochordates are one of the earliest to evolve.

Complete Chordata : UPSC-CSE/IAS/IFoS

Complete Notes/Book By Dheeraj Sharma (Chordata) : UPSC-CSE/IAS/IFoS

                           

Chordata : UPSC-CSE/IAS/IFoS

(Download pdf and Watch Lessons One by One)

1. Class 27th | Protochordata – Classification 

2. Class 28th | Protochordata - Origin of Chordates & Branchiostoma 

3. Class 29th | Protochordata – Herdmania 

4. Class 30th | Pisces – Respiration 

5. Class 31st | Pisces – Locomotion 

6. Class 32nd | Pisces – Migration 

7. Class 33rd | Amphibia – Origin 

8. Class 34th | Amphibia - Parental care 

9. Class 35th | Amphibia - Anura (Parental care) & Paedomorphosis 

10. Class 36th | Reptilia - Origin & Skull Types 

11. Class 37th | Reptilia - Status of Sphenodon 

12. Class 38th | Reptilia - Status of Crocodilia 

13. Class 39th | Aves – Classification 

14. Class 40th | Aves - Origin of Birds 

15. Class 41st | Aves - Flight Adaptation 

16. Class 42nd | Aves – Migration

17. Class 43rd | Mammals – Classification 

18. Class 44th | Mammals - Origin & Dentition 

19. Class 45th | Mammals - Egg laying 

20. Class 46th | Mammals – Pouched 

21. Class 47th | Mammals – Aquatic 

22. Class 48th | Mammals - Primates (Prosimians) 

23. Class 49th | Mammals - Primates (Anthropoidea) 

24. Class 50th | Mammals - Endocrine Glands | Part - 1st 

25. Class 51st | Mammals - Endocrine Glands | Part - 2nd 

Download Zoology (Optional) Previous Year Question :

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