3. What is the modern classification
system used by biologists?
The Linnaean Hierarchy
The Linnaean system of classification consists of a hierarchy of graded
taxonomic (named) ranks that are called as taxa. Any given taxon (singular)
may contain several lower taxa, which can be usually distinguished based on
certain common characteristics. Such lower ranks may in turn be divided into a
succession of progressively smaller ranks.
Binomial Nomenclature
It is the system of giving a scientific name to an animal or a plant, an
outstanding system contributed by Carolus Linnaeus. According to this system,
any given animal or plant is given a scientific name consisting of two words.
The first word refers to name of the genus while the second word refers to the
name of the species.
4. Two Kingdom Classification
The natural system of classification has
been subjected to periodic reviewing as a result
of the continuous input of information and new
scientific tools being available on various
aspects of living organisms. Various schemes
of classification are now available, each having
certain merits and demerits. One of the earliest
scheme of natural system classification is the
two-kingdom classification proposed by Carolus
Linnaeus in 1758.
5. Five Kingdom Classification
The present trend in biology is to follow the five
kingdom classification proposed by R.H.Whittaker in
the year 1969.
Summary
The modern classification is an extension of the
system of classification proposed by Carolus Linnaeus.
The present system of classification involves a series
of graded taxonomic ranks called taxa which include
phylum and family in addition to the four taxa
introduced by Linnaeus.
6. Basis of classification
To put things in order so they are
easier to find
To show how things share certain
traits
7. How did the modern classification
system come about?
Carolus Linnaeus (1735)
Called the two largest groups Kingdoms. Classified animals
and plants into more groups.
Based his groups on specific traits. Gave organisms two-
part names that described their traits (binomial
nomenclature).
It started from three and a half billion years ago when
revolution just started.
10. Characteristics of Animals~
● Vertebrates and Invertebrates
● They respond to their surrounding
● They are multi-cellular
● They give reproduce
● They are capable of movement
