by STAO ADMIN | Nov 13, 2019
This demonstration uses food and a series of containers and additives to model the process of mechanical and chemical digestion in the human (mammalian) digestive system. The demonstration begins with actual food items and ends with a paste closely resembling fecal...
by STAO ADMIN | Nov 13, 2019
Proteins have specific uses inside cells to support biochemical reactions important for cell structures and metabolic processes. Cells maintain a balanced internal environment that allows these proteins to retain the structure important to whatever action it performs....
by STAO ADMIN | Nov 13, 2019
This activity demonstrates the use of carbon by an aquatic plant. The process of photosynthesis can be represented by the reaction: CO2 + H20 + light _ C6H12O6 + O2. There are two distinct steps: the light dependent reactions (involving H20) and the light independent...
by STAO ADMIN | Nov 13, 2019
This demonstration results in the isolation of DNA from banana. It is very useful for students to see DNA to bring some sense of physical reality to what can be a very abstract topic.
by STAO ADMIN | Nov 13, 2019
Osmosis, the movement of a solvent (usually water) across a semi-permeable membrane from an area of higher solvent concentration to an area of lower solvent concentration, is key in the maintenance of homeostasis. This demo shows osmosis across a semi-permeable...
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