Organisms are made up of cells. Most organisms are multicellular and have cells that are specialised to do a particular job. Microscopes are needed to study cells in detail. In this video, Greg Foot ...

Almost all animal species—including humans—have blood cells, but between different species our blood tells different stories. The lineage and components of blood cells vary widely, and this variety is ...

Even though sugars are often framed as simple sources of energy, they also serve as structurally complex and functionally diverse molecules that mediate interactions between organisms. Among these, ...

Light and electron microscopes allow us to see inside cells. Plant, animal and bacterial cells have smaller components each with a specific function. Enzymes - Edexcel Enzymes are biological catalysts ...