1 Most cases of COPD, and therefore emphysema, are caused by cigarette smoking. 2  Emphysema is rarely caused by a congenital condition known as Î±1-antitrypsin deficiency, for which there is a lab test. 3  Shortness of breath and cough are the main symptoms of emphysema.
Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies all of the organic compounds and most of the energy necessary for life on Earth.
Save. Creatas Images/Creatas/Getty Images. Photosynthesis is the process through which an organism internally makes food by breaking down sunlight. Organisms that make food through photosynthesis are classified as autotrophs, as opposed to heterotrophs, which must consume other organisms to make their food.The kingdoms which contain photosynthetic organisms are Monera, Protista and Plantae.ave. Creatas Images/Creatas/Getty Images. Photosynthesis is the process through which an organism internally makes food by breaking down sunlight. Organisms that make food through photosynthesis are classified as autotrophs, as opposed to heterotrophs, which must consume other organisms to make their food.