A vertebrate is an animal that has a backbone, including fish, amphibians, reptiles, birds, and mammals.
A cell is the basic structural and functional unit of all living organisms.
An ecosystem is a community of living organisms interacting with each other and their non-living environment.
An organ is a group of tissues working together to perform a specific function in the body.
Key definitions and terms across biology topics for quick lookup and concept reinforcement.
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose and oxygen.