Biology

: The cell is the fundamental unit of all living things. Some organisms, like bacteria, consist of a single cell, while others, like humans, are made of trillions.

: Evolution explains both the unity and the incredible diversity of life on Earth. Through natural selection, organisms develop adaptations that improve their chances of survival and reproduction. Biology

: All living things must capture and transform energy to survive—whether through photosynthesis in plants or consumption in animals. They must also maintain homeostasis , a stable internal environment despite external changes. Major Branches of Biology : The cell is the fundamental unit of all living things