Endosymbiotic Theory
Endosymbiotic theory explains the origin of the complex cells that make up plants, animals, fungi, and other higher organisms. It proposes that key…
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Mendelian Inheritance
Mendelian inheritance is the set of principles describing how traits are passed from parents to offspring through discrete units we now call genes.…
Cell Theory
Cell theory is one of the foundational ideas of biology. It holds that all living things are made of cells, that the cell is the basic unit of life,…
Germ Theory of Disease
The germ theory of disease is the scientific theory that many illnesses are caused by microorganisms, living agents too small to see, that invade the…
Evolution by Natural Selection
Evolution by natural selection is the scientific theory that explains how the diversity of life arose and continues to change. It holds that…
The Gut-Brain Axis: Microbiome Influence on Mental Health
The gut-brain axis describes the bi-directional signalling between gut microbiota and the central nervous system via the vagus nerve, immune system,…