Question

Which of the following pairs are correctly matched?
$\left(1\right)$ Poikilothermous – Birds and mammals
$\left(2\right)$ Agnath – Petromyzon and Myxine
$\left(3\right)$ Tunicates – Ascidia, Salpa and Doliolum
$\left(4\right)$ Cartilaginous fishes – Betta and Labeo

• A. $1$ and $2$
• B. $1,2$ and $3$
• C. $2$ and $3$
• D. $1,2$ and $4$

Answer 1

The correct option is C $2$ and $3$

Agnatha ('without jaws') is an infraphylum of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of classes like cyclostomes. Example- Petromyzon, myxine.
Phylum Chordata is divided into three subphyla: Urochordata or Tunicata, Cephalochordata and Vertebrata.
Examples: Urochordata – Ascidia, Salpa, Doliolum;
Cephalochordata – Branchiostoma (Amphioxus or Lancelet).

So, the correct answer is option 'c'.