why evolution does not proceed as ' ladder of progress ' but occurs as

1.	why evolution does not proceed as ' ladder of progress ' but occurs as branches of trees
Answer» Evolutionary process is compared to a tree instead of a ladder. Phylogeny is a tree diagram which has its own stages and branches evolve from these stages. Phylogenetic tree exhibits lot of information about evolutionary relationships. Classification of organisms is based on hierarchical system, a step wise system. Hence phylogenetic system is used for classifying organisms. Phylogeny is represented in the form of a tree as single step may give rise to many forms which evolve as branches arising from single place. Evolutionary process is not compared to a ladder. Involving ladder for showing evolutionary process is not apt as it is not a sequential process one above the other. It is a branched process.

why evolution does not proceed as ' ladder of progress ' but occurs as branches of trees

Answer»

Evolutionary process is compared to a tree instead of a ladder.

Phylogeny is a tree diagram which has its own stages and branches evolve from these stages. Phylogenetic tree exhibits lot of information about evolutionary relationships. Classification of organisms is based on hierarchical system, a step wise system. Hence phylogenetic system is used for classifying organisms. Phylogeny is represented in the form of a tree as single step may give rise to many forms which evolve as branches arising from single place. Evolutionary process is not compared to a ladder. Involving ladder for showing evolutionary process is not apt as it is not a sequential process one above the other. It is a branched process.

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