Question

Which of the following ‘Suffixes’ used for units of classification in plants indicates a taxonomic category of ‘family’?
(a) -Ales
(b) -Onae
(c) -Aceae
(d) -Ae

Answer 1

Hint: A taxonomic group between division and order is family. It concerns one genus or more. The family name suffix begins with the first alphabetical letter in English. This word's number of letters corresponds to a prime number. This is the only prime number that is the sum of the two prime numbers that are consecutive.

Complete answer:
"Aceae" is the suffix used in the classification of plants to define the taxonomic division of "family".  Families hold fifth place in the taxonomy classification.
The plant family name is a plural adjective and is formed by adding a suffix-Aceae. Some examples are Rosaceae, Linacae, and Cucurbitaceae.
Different international bodies codify the naming of families using the following suffixes:
- The family names of plants, fungi, and algae end with the suffix 'aceae' in fungal, algal, and botanical nomenclatures, with the exception of a limited number of historical but commonly used names, including Compositae and Gramineae.
- The family names of animals in zoological nomenclature end with the suffix 'idae.'

Additional information:
- The suffix used for the order is ‘ales’.
- The suffix used for the class is ‘ae’.
- The suffix ‘onae’ is not used for any taxon.
So, the correct answer is, ‘(c) Aceae’.

Note: One of the eight main hierarchical taxonomic ranks in Linnaean taxonomy is the family (Latin: familia, plural familiae); it is divided between order and genus. It is possible to split a family into subfamilies, which are intermediate ranks between the family and genus ranks. The official names of the genus are of Latin origin; however, popular names are sometimes used: walnut trees and hickory trees belong to the Juglandaceae family, for example, but this family is generally referred to as the walnut family.