License Courses. The OAR licensing programs provide a solid foundation to prepare you for the state exam to obtain your Provisional Sales Associate License and Brokerâs License. Sales Associate License. Complete the Pre-License Course and receive your OREC approval to take the provisional sales associate license exam.
Phytoplankton refers to the autotrophic component of the plankton that drifts in the water column. Most phytoplankton are too small to be individually seen with the unaided eye. Phytoplankton, like plants, obtain energy through a process called photosynthesis, and so must live in the well-lit surface layer of an ocean, sea, or lake. Through photosynthesis, phytoplankton (and terrestrial plants) are responsible for much of the oxygen present in the Earth's atmosphere.
Phytoplankton growth is often limited by the scarcity of iron in the ocean. As a result, many people are discussing plans to fertilize large areas of the ocean with iron to promote phytoplankton blooms that would transfer more carbon from the atmosphere to the deep sea.hytoplankton are mostly microscopic, single-celled photosynthetic organisms that live suspended in water. Like land plants, they take up carbon dioxide, make carbohydrates using light energy, and release oxygen.