Common characteristics found in between aves and mammals are
a. Respiration in by lungs
b. Heart if four-chambered
c. Homoiothermy
d. Larva is not found
e. Dioecious and internal fertilisation
f. Jaws are provided with teeth.

How many among following characteristics are common in betweenr eptiles and birds? a. Four-chambered heart. b. Scales c. Homoiothermous (warm-blooded) d. Dioecious and internal fertlisation e. Ovipary and direct development.

Common characteristics found in chondrichthyes and osteichthyes a. Streamlined body b. four pairs of gills c. Two-chambered heart d. Poikilothermous (cold-blooded) e. Dioecious (sexes are separate) f. Internal fertilisation

A four-chambered heart is not found in (a) birds (b) mammals (c) snakes (d) crocodiles

A four-chambered heart is not found in (a) birds (b) mammals (c) snakes (d) crocodiles

Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception (a) Mammalia : Give birth to young ones . (b) Reptilia : Possess three - chambered heart with one incompletely divided ventricle (c) Chordata: Possess a mouth provided with an upper and a lower jaw (d) Chondrichthyes : Possess cartilaginous endoskeleton

A four-chambered heart is characteristic of : (a) bony fish (b) mammals (c) amphibians (d) none of these