A millibar is a unit of pressure which is most commonly seen in the context of meteorology, where atmospheric pressure is sometimes given in millibars. As the name would suggest, a millibar is equal to one thousandth of a bar.
User: The microscopic organisms at the base of the marine food chain are known as A. plant life. B. terrestrial animals. C. primitive life. D. phytoplankton. Weegy: The microscopic organisms at the base of the marine food chain are known as Phytoplankton. User: In addition to being necessary for respiration, _______ also provides UV radiation protection. A. water B. hydrogen C. oxygen D. carbon dioxide.
Nekton, Benthos, & Plankton â Lecture Script. Marine life in the oceans includes organisms of all sizes, shapes, and character â from the smallest bacteria and. protists â single-celled heterotrophs and autotrophs visible through only the highest power microscopes â to the. largest organism on planet Earth at 100 feet long â the Blue Whale.