There are two modes of classifying an organism due to which two different cladogram are produced-
A) When the organisms are grouped together on the basis of similarities shared by them – Such species are named based on the name of older species and the newly discovered species sharing similar traits are kept under older species thereby dropping its own name.
B) In the second method, the minute differences are observed in species to group them into several branches arising from one parent organism.
A physical change is basically a body change so like if a crayon is solid then sits in the sun for a long time it melts away that’s a physical change because it changes its physical appearance
