Question

DIFERENTIATE PARAM on the basis of the chamber of heart,mode of fertilization respiration for class 9th

Answer 1

a) Chambers of heart:

Bony fish has 2 chambered heart, one atrium and one ventricle. Deoxygenated blood enters the atrium arrives then the ventricle where it is pumped to the body via the gills.

On the other hand, birds just like mammals have a 4 chamber heart.

b) Respiratory organ:

Bony fish has gills as respiratory organ.

In birds, unlike mammals, air sacs are present along with lungs for respiration.