Tag: systematics of living world

• Initially, the Phylogenetic system was proposed by Engler and Prantl. In their treatise 'Die Naturlichen Pflanzen Familien', they arranged the flowering plants according to the increasing complexity of their floral morphology. 
  
• John Hutchinson was a British botanist associated with Royal botanic gardens, Kew, England.  His phylogenetic system first appeared as  "The Families of Flowering plants " in two volumes. 
• Carolus Linnaeus was a Swedish botanist who formalized binomial nomenclature, the modern system of naming organisms. He is known as  The Father of Taxonomy. 
• George Bentham was an English botanist whose classification of seed plants (Spermatophyta), based on an exhaustive study of all known species, served as a foundation for modern systems of vascular plant taxonomy.

Meiosis occurs during the formation of gametes (gametogenesis) in the life cycle of flowering plants to reduce the chromosome number from diploid to haploid.

Taxanomy is a scince of classifying living things according to their similarities and diferences.

• Modern taxonomy is based on the hypotheses' of the evolutionary history of organisms, known as Phylogeny. As with the scientific method, scientists develop a hypothesis on the history of an animal and utilize modern science and technology to prove phylogeny.
• With the advent of such fields of study as phylogenetics, cladistics, and systematics, the Linnaean system has progressed to a system of modern biological classification based on evolutionary relationships between organisms, both living and extinct.
• So the correct option is 'phylogeny'.

Plants exhibit sensitivity and irritation but sensor organs are absent.

So, the statement is ‘True’.

Ther term taxonomy is introduced by Carl Linnaeus. He is called as the father of taxonomy. He developed taxonomic hierarchy. It is also called as Linnaeus hierarchy. In it, domain is the highest rank followed by kingdom, phylum, class, order, family, genus, and species. Species is the lowest rank in the hierarchy. 

Artificial systems of classification were based upon vegetative and sexual characteristics, where both vegetative and sexual characteristics were given equal weightage. It was not acceptable because vegetative characters are more easily affected by environment.

Classification based on evolutionary relationships of organisms is called phylogenetic system of classification.