Animals belonging to Phylum Chordata are fundamentally characterised by the presence of structures noted as A, B C and D. Identify them and select the correct option. A. A-Notochord, B-Nerve cord, C-Gill slits, D-Post-anal partB. A-Nerve cord, B-Notochord, C-Gill slits, D-Post-anal partC. A-Nerve cord, B-Notochord, C-Post-anal part, D-Gill slitsD. A-Nerve cord, B-Gill slits, C-Notochord, D-Post-anal part

Animals belonging to Phylum Chordata are fundamentally characterised b

1.	Animals belonging to Phylum Chordata are fundamentally characterised by the presence of structures noted as A, B C and D. Identify them and select the correct option. A. A-Notochord, B-Nerve cord, C-Gill slits, D-Post-anal partB. A-Nerve cord, B-Notochord, C-Gill slits, D-Post-anal partC. A-Nerve cord, B-Notochord, C-Post-anal part, D-Gill slitsD. A-Nerve cord, B-Gill slits, C-Notochord, D-Post-anal part
Answer» Correct Answer - B The given figure shows the internal organisation of a hypothetical chordate. It posseses notochord `(B)` either during early embroyonic stage or throughout life. The notochord lies ventral to nerve cord `(A)`. It posseses a post anal tail `(D)` and paired pharyngeal gill slits `(C)`.