Introduction to Biology

Primary Unit of Life

• The cell is the fundamental unit of life, serving as the basic building block for all living organisms.

Role of Biologists

• Biologists study life by examining the structure, function, growth, evolution, and distribution of organisms, contributing to our understanding of life processes.

Theme Explaining Unity and Diversity

• The theme of evolution explains the unity and diversity among living organisms, highlighting how species adapt and change over time while sharing common ancestors.

Organismal Functionality

• Energy input allows organisms to move, grow, and reproduce, as it is essential for biological processes and sustaining life.

Emergence of Life on Earth

• Life on Earth emerged approximately 3.5 to 4 billion years ago, marking the beginning of complex biological processes and ecosystems.