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Several enzymes are involved in digestion. Amylase is produced by the salivary glands and pacreas and starts working as soon as food is ingested, breaking down starch into maltose in the mouth and also th...

Hormones are chemical messengers. They are released from special gland cells and travel in the bloodstream to reach their target organs, where they will have their effect. Whereas nerve cells carry electr...

Most proteins have 3 or 4 levels of structure which include the primary, secondary and tertiary structure, with many also having a Quaternary structure. Firstly, the primary structure is the unique sequen...

The process through which cells convert organic molecules into energy is called “respiration”. This process occurs in every cell of every organism and is vital to its survival.

Usually, respiration...

Taxonomy is how species are scientifically classified. Note, a species is a group of animals that are able to interbreed to produce fertile offspring. Species are organised into groups based on their evol...