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idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells
5 Characteristics of a Living Organism
adaptation/ to expel waste/death/ reproduction/ produce energy
Selectively permeable Membrane
a membrane that keeps out some particles but allows others to pass through
dead or weakened pathogens that are injected into the body to cause the production of antibodies that will prevent disease
Body System Hierarchy
chemical level/ cellular level/ tissue level/ organ level/ system level/ organism level
occurs when the chemical energy we take in through the food we eat is changed into energy that cells use to carry out their activities
contains digestive chemicals that break down food particles/ cell wastes/ worn-out cell parts
the chemical reaction that takes place when CO2 and water react to the presence of sunlight and creat glucose (food) and O2
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