Question

Which of the following groups of animals is correctly matched with its one characteristics feature without even a single exception?
A.Reptiles possess three chambered heart with one incompletely divided ventricle
B.Chordata possess a mouth provided with a upper and a lower jaw
C.Chondrichthyes possess a cartilage endo skeleton.
D.Mammalia gives birth to young once.

Answer 1

Hint:For the hierarchy classification of organisms a standard system is formed which has different stages of kingdom, phylum, class, order, family, genus, species here species have high number of similar characters and kingdom have less number of similar characters.

Complete step by step answer:
1 :- Here it is said that the reptiles possess three chambered heart with one incompletely divided ventricle that is they have two aorta and one ventricle but this is not universal for all reptiles as crocodiles belongs to the phylum reptiles but it have complete four different chambered heart like the mammals as mammals have four chambered heart.
2 :- Now they said that chordata possess a mouth provided with an upper and a lower jaw but the jawless fish have all characters similar to that of chordata but by his name they don’t have any jaw.
3 :- Now the term is mammalia gives birth to the young once but it also has an exception all mammals give birth to the young once but monotremes is the only organism which belongs to mammals but lays eggs instead of young once.
4 :- Now the next statement is chondrichthyes posses a cartilage endo skeleton this statement is completely true and don’t possess any exception as all chondrichthyes and cartilage endo skeleton as they have to live in water so to float on the surface of water requires reduction in the weight, for weight management they have cartilage endoskeleton.

Option C is correct.
Note:
Organisms of chondrichthyes class include cartilaginous fishes, shark, skates, rays and chimaeras.