1. Characteristics and Classification of Living Organisms

IGCSE Biology Unit 1

Characteristics of Living Organisms

MRS.GREN

Movement

An action by an organism or part of an organism causing a change in position or place

Sensitivity

The ability of an organism to detect and respond to changes in its environment.

Growth

The process of increasing in size or amount, often involving cellular division and differentiation.

Reproduction

The biological process by which organisms produce new individuals, ensuring the continuation of their species.

Excretion

The process by which living organisms remove waste products from their bodies, maintaining homeostasis and proper functioning.

Nutrition

The process by which living organisms obtain and utilize nutrients for energy, growth, and maintenance of bodily functions.

Species

A group of similar organisms that can breed and produce fertile offspring, sharing common characteristics.