👉 Biology, at its core, is the study of life processes and organisms, encompassing everything from the molecular interactions within cells to the complex behaviors of ecosystems. At the cellular level, life is driven by DNA, which contains the genetic instructions for an organism's development, function, and reproduction. These instructions are transcribed into RNA and then translated into proteins, the workhorses of the cell that perform a wide range of functions, from catalyzing chemical reactions to providing structural support. Cells communicate and coordinate their activities through signaling pathways, involving hormones, neurotransmitters, and other molecules. At the organismal level, biology explains how tissues, organs, and systems work together to maintain homeostasis and respond to the environment. For example, the immune system uses a complex network of cells and proteins to identify and neutralize pathogens, while the nervous system processes information through electrical and chemical signals. At the ecosystem level, biology examines interactions between organisms and their environments, including energy flow, nutrient cycling, and population dynamics, highlighting the interconnectedness of all living things.
