This book focuses readers on the function of plants and the role they play in our world. The authors emphasize the scientific method to help readers develop the critical thinking skills they need to make sound decisions throughout life. This focus on how plants work and the development of critical thinking skills together support the ultimate goal of developing scientific literacy. This book is organized around the themes of DNA science, global ecology, and evolution. The key concepts discussed in the book are molecules, cells and microbes; plant structure and reproduction; and, plant diversity and the environment. For anyone interested in botany (plant biology).