What is Taxonomy and Who Introduced It? Taxonomy is the science of how living things are grouped together. Another name often used for taxonomy is classification. Scientists who study taxonomy are called taxonomists. The Greek scientist, Aristotle (384-322 B.C.), was one of the first scientist to organize living things, thus among other things he studied, […]
Archives for June 16, 2010
Plant Cells: Vacuoles
Vacuoles are a membrane-bound storage sacs filled with a watery fluid. Mature plant cells may have only one vacuole occupying up to 90% of the total plant cell volume. Some of the function of a plant vacuole include: * store wastes* isolate materials that might be harmful to the cell* maintain internal hydrostatic pressure (turgor) […]
Food Preserving:Dehydrating
Did You Know? Raisins are dried out grapes. Another way of describing raisins is that they are dehydrated grapes. Dehydration is the process by which water is lost by something, such as grapes. Terms absorption cell cell wall dehydration grapes hydrate microbes preserving food raisins reconstitution rehydration Even before the Native Americans hung strips of […]
Teeth: Anatomy and Development
Anatomy and development of the mouth and teeth: Baby teeth are also called deciduous teeth, milk teeth, primary teeth, and temporary teeth. Teeth begin developing below the gum in the fetus (developing baby within its mother). Proper development of teeth depends on good nutrition from the mother during pregnancy. The mother’s diet should have adequate […]
Digestion:Chewing
Why is it important to thoroughly chew food? Digestion is the process of breaking the food you eat into small enough pieces to be used by your body. This process starts in your mouth. First, knife-like teeth in the front of your mouth, called incisors, cut and slice a small piece from the food. The […]