$A :$ Members of a species are reproductively isolated from the members of other species.
$R :$ Species is the basic taxonomic category.

Dicotyledonae is a ....... .

Who published the book 'Species Plantarum' and provided a basis for the classification of plants?

Select the correct statements $(i-iv)$ regarding taxonomic categories.
$(i)$ Each step or rank in hierarchy is called taxonomic category.
$(ii)$ Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
$(iii)$ Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom,phylum or division,class,order,family,genus and species.
$(iv)$ Lower the category,greater is the difficulty of determining the relationship to other taxa at the same level.

Which one of the following is a species?

Plants belonging to different classes,with a few similar characters are assigned to a category called