Page 84 - Biology_F5

Two
Chapter

Principles of

FOR ONLINE READING ONLY
classification

Introduction

Planet Earth contains different kinds of organisms, ranging in size from microorganisms
to macro-organisms. Due to the existing diversity of organisms, it is difficult to clearly

understand their characteristics and how they are related in evolutionary terms. Classification
helps in identification and grouping of organisms that share common characteristics and
traits. In this chapter, you will learn about the classification systems, taxonomic ranks,
binomial nomenclature, and taxonomic keys. The competences developed will enable
you to identify and group organisms according to their characteristics.

initially classified organisms into two
Think major groups, namely animals and plants.
With advances in science and technology,
The confusion would occur if there classification has constantly been dynamic
could be no principles of classifying and and more refined. For example, by using
naming organisms. electron microscope and molecular
techniques, taxonomists have classified
2.1 The concept of classification organisms into five kingdoms, namely

Task 2.1 Monera, Protoctista, Fungi, Plantae, and
Search for information from library Animalia. Considering the fact that the
number of organisms occupying the earth
and internet sources about the concept is large, it has been difficult for scientists
of classification. to study each individual organism. Since

related organisms share some common
The science of classification of living features, scientists group related organisms
organisms dates back to 384-322 BC, together so that they can easily study their
when the first taxonomist, Aristotle characteristics.

77