… energy and its conversion to chemical energy, followed by synthesis of sugar phosphates that become converted to sucrose, cellulose, starch and other end products. In plants, photosynthesis takes place in the chloroplasts. Chloroplasts are formed…

… photosystem was initially observed in 1887 by Erwin Esmarch who described the first successful isolation of a photosynthetic bacterium in pure culture. In his essay, he noted that "the spirillum only produces pigment if the air is completely or almost…

… which producers and some bacteria make the food they need to survive. This process is far more important than just making food for themselves, it provides almost all the food needed for all living things above producers on the food chain. Another…

… improves our life. Technology increase the efficiency to which we do our work, increasing the standard of living. Medicine improves our physical and mental being. But for this to be true we have to add another aspect. Physical activity is…

… helps a person take his or her own life by giving advice, writing a prescription for lethal medication, or assisting the individual with some device which allows the person to take his or her own life. The physician lends expertise, but the person does…

… is the medium of music, most of the physics of music is the physics of sound. It's important to remember that sound waves are compression waves. You can imitate a compression wave by stretching out a slinky (you do have a slinky, don't you?) and…

… doubt, one of the most exciting and adventurous sports is scuba diving. The underwater realm is definitely a world to itself. Seas, lakes, quarries, oceans, and rivers have submerged habitats that will capture your interest and imagination for a lifeti…

… takes a total of three seconds to fall. Assuming that the ride is in total free fall, the ride is accelerating the most at the point right before it begins to slow down or decelerate. Its greatest speed is 62 mph and the point of the ride's greatest…

… that some environmental chemicals can cause risks to the developing embryo and fetus. Evaluating the developmental toxicity of environmental chemicals is now a prominent public health concern. The suspected association between TCE and congenital cardi…

… earth was not suitable for life as the atmosphere contained little to no oxygen and without this, deadly ultra violet rays from the sun bombarded the unprotected surface. This lead to life beginning in the ocean where it was safe from the sun's rays.…