Question

who proposed the eight Kingdom system of classification? Give an outline and criteria for classification in this system? Distinguishing between life cycle and Life span citing suitable examples?(Marks___1+6+3=10)

Answer 1

The classification system of life introduced by British zoologist Thomas Cavalier-Smithinvolves systematic arrangements of all life forms on earth. Following and improving the classification systems introduced by Carl Linnaeus, Ernst Haeckel, Robert Whittaker, and Carl Woese, Cavalier-Smith's classification attempts to incorporate the latest developments in taxonomy. His classification has been a major foundation in modern taxonomy, particularly with revisions and reorganisations of kingdoms and phyla
By 1910 the animal kingdom had been subdivided into twelve phyla:

protozoa,porifera (sponges),coelenterata (e.g. jellyfish),platyhelminthes (flat worms),nemathelminthes (e.g. nematodes),trochhelminthes (Rotifers andGastrotricha),echinodermata (e.g. sea urchins, starfish),annulata (Polyzoa, Phoronida, andBrachiopoda),arthropoda (insects, arachnids andcrustaceans),molluscoida,mollusca (e.g. octopus, clams), andchordata (e.g. vertebrates).

The protozoa were originally classified a