Explain how animals in vertebrata are classified into further subgroups.
Vertebrates classified into further subgroups on the basis of simple to complex form , the structure of the organs like gills/lungs, heart and function of the organisms .
For example, fishes have two chambered heart, amphibians and reptiles have three chambered heart where as aves and mammals have four chambered heart to keep oxygenated and deoxygenated blood separately.
How would you choose between two characteristics to be used for developing a hierarchy in classification?
Explain the basis for grouping organisms into five kingdoms.
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Give three examples of the range of variations that you see in life form around you.
