Who wrote the book $Species\, Plantarum$?

When is the diversity in living organisms observed to be greater?

According to binomial nomenclature,every living organism has

Which of the following is $NOT$ true for a species?

The statement,'Systematics is the study of the diversity of organisms and all their comparative and evolutionary relationships,' is attributed to:

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?