Which one of the following is incorrectly matched with its characteristic and the taxon?
 

	Animal	Characteristics	Taxon
(I)	Trygon	Poison sting	Chondrichthyes
(II)	Scoliodon	Ampulla of Lorenzini	Chondrichthyes
(III)	Exocoetus	Pectoral fin is large	Osteichthyes
(IV)	Hippocampus	Parental care	Chondrichthyes

Name the classes of Tetrapoda that exhibit the following characters:

Observe the following simplified scheme and choose the correct option that matches with the letters given in the boxes.

Which of the following statements are true for the phylum-Chordata?

(a) In Urochordata, notochord extends from head to tail, and it is present throughout their life.

(b) In Vertebrata, the notochord is present during the embryonic period only.

(c) Central nervous system is dorsal and hollow.

(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata, and Cephalochordata.

Statement I: Sternum appeared for the first time in amphibians.
Statement II: Snakes have $10$ pairs of cranial nerves.

The correct option among the following is

Identify the wrongly matched Scientific and common name:

Which of the key adaptations helped evolutionary success of Reptiles on land?

A Warm-bloodedness

B. Pulmonary respiration and dry scaly skin

C. Internal fertilisation

D. Amniotic & Cleidoic eggs

Statement $\left(\mathrm{S}\right):$ Chordates have a tail extending posterior to the anus. It contains skeletal elements and muscles but lacks coelom and visceral organs.

Reason $\left(\mathrm{R}\right):$ In aquatic organisms, it acts as a balancing organ.