Question

Which of the following characteristic features always
holds true for the corresponding group of animals?
(1) chondrichthyes-
Cartilaginous
endoskeleton
(2) Viviparous-
Mammalia
(3) chordata-
Possess a mouth with
an upper and a lower
jaw
(4)Reptilia-
3 - chambered heart
with one incompletely
divided ventricle​

Answer 1

Answer:

(1) Chondrichthyes posses cartilagenous endoskeleton