Animals, including humans, need to absorb all glucose molecules from their food. This is taken from the gut wall, inside the small intestine, into the blood. There is more glucose (a higher ...

You dip your teabag into a cup of boiling water and watch the clear steaming liquid slowly change into an inviting rich red. The laws by which the particles of tea spread from the source of high ...

Part of Biology (Single Science) Living together - Food and ecosystems Active transport is a process that moves molecules against a concentration gradient. The process requires energy. For plants to ...