Biology | For Igcse #1

Organisms are classified into five major kingdoms, ranging from complex multicellular organisms to single-celled bacteria:

Characteristics of Living Organisms - IGCSE Biology Revision

To be considered alive, an organism must fulfill seven specific criteria, easily memorized using :

ovement, R espiration (releasing energy), S ensitivity (detecting stimuli), G rowth, R eproduction, E xcretion (removing metabolic waste), and N utrition. 🗂️ 1.2 Concept and Uses of Classification

. This foundational unit outlines the essential life processes that define living things and explains how scientists organize them into groups. 🧬 1.1 The 7 Characteristics of Life