STEM, then, is a specific program designed for a specific purposeâto integrate and apply knowledge of math and science in order to create technologies and solutions for real-world problems, using an engineering design approach. Itâs no surprise that STEM programs need to maintain an intense focus.
Excise definition, an internal tax or duty on certain commodities, as liquor or tobacco, levied on their manufacture, sale, or consumption within the country. See more. Dictionary.com
Excretion and the liver Excretion in mammals Excretion is the removal of potentially harmful or toxic substances from the body. These substances are usually waste materials produced by complex chemical reactions taking place in living cells. Enzymes catalyse the reactions.