Question

Q 5. Explain phylogenetic system of classification?

Answer 1

classification of organism on the basis of decent common ancestor

Answer 2

HLO MATE HERE IS UR ANSWER

⭐. Phylogenetic system of classification is introduced by Ernst Haeckel.

⭐. It is based on common Ancestry.

⭐. Two basic terms in this classification are

1. phylogeny 2. clade.

⭐. The ' evoluton history' of a group of genetically related organisms is called "phylogeny"( life tree ).

⭐. A phylogeny is represented by a tree diagram and is called phlyogenetic tree.

⭐. Clade is a 'group of organisms' that includes a common ancestor species and all its descendants.

⭐. It includes all ancestors species and their descent species.

⭐. Clade represents a single branch on the phylogeny (life tree )

⭐. cladestic characters

❤. ANALOGOUS CHARACTERS ( BASED ON FUNCTION ) ❤

⭐. EX: Wings of birds and butterflies .

⭐. Wings of sparrows and patagia in flying squirrles.

❤ . HOMOLOGOUS CHARACTERS ( INHERITED FROM COMMON ANCESTORS )❤

⭐. EX: Forelimbs of birds , Forelimbs of whales.