Question

define the and understand the following terms phylum ,class, family, order, genus​

Answer 1

Phylum is second highest unit of classification after Kingdom. It includes one or more related classes of animals. In plants, instead of phylum, the term ‘division’ is used.

Class is a taxonomic group consisting of one or more related orders. For example, the class, Mammalia, includes many orders like Primata (Man), Carnivora(Lim, tiger) etc.

Family is a taxonomic group containing one or more related genera eg. Family hominidae contains Apes, Monkeys and Man. In plants, families are categorized on the basis of vegetative and reproductive features.

Order is a taxonomic group containing one or more families. For example, the order, carnivora, includes many families.

Genus is a taxonomic group including closely related species. For example, the genus, Solanum, includes many species such as nigrum, melongen a, tuberosum, etc.

Answer 2

Answer :

(i) Phylum

It is taxonomical hierarchy below Kingdom and above class. It is taxon with one or more classes organisms with similar characteristics. Ex - Leo and Tigris are two different species.

(ii) Class

Class is the taxonomical hierarchy higher than Order and lower than Phylum. Class includes related to orders of the organisms. Ex - Mammalia is the class of different orders like Carnivora and Primata.

(iii) Family

It has a group of related genera with still less number of similarities as compared to genus and species. It is a group of entities below order and above genus. Ex - Felidae is the family of genus like Felis and Panthera.

(iv) Order

It is a taxon higher than family and lower than class. Order is higher category and a assemblage of all families which exhibit a very few similar characters. Ex - Polymoniales is the order of families like Convolvulacaea and Solanaceae.

(v) Genus

Genus comprises a group of related species which has more characters in common in comparison to species to species of other genera. It is above species and below family. Ex - Panthera is the genus of species like leo, pardus and tigris.