Linnaeus classified plants into $24$ groups based on which of the following?

The process of grouping organisms into convenient categories based on easily observable characters is called .........

The word 'Systematics' is derived from the Latin word 'Systema'. It means ......

Phenetic classification is based on which of the following?

The common name of pea is simpler than its botanical (scientific) name $Pisum$ $sativum$. Why then is the simpler common name not used instead of the complex scientific/botanical name in biology?

The complete name of a plant in binomial nomenclature has