1 Birth defects in the sinuses. 2  Infection in the bones of the sinuses (osteomyelitis) 3  Injury to the face over the sinuses from trauma. 4  Masses and tumors, including cancer. 5  Nasal polyps. 6  The cause of repeated bloody noses (epistaxis)  Sinus infection (sinusitis)
Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms' activities.n most cases, oxygen is also released as a waste product. Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis maintains atmospheric oxygen levels and supplies all of the organic compounds and most of the energy necessary for life on Earth.
Photosynthesis can be thought of as the opposite process of cellular respiration. Through two processes known as the light reactions and the dark reactions, plants have the ability to absorb and utilize the energy in sunlight.