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.
Many types of plankton are microscopic, but jellyfish that are meters long can be considered plankton because they always travel with the current. These organisms can be divided into two main categories: Phytoplankton and Zooplankton.Animal-like plankton are called zooplankton. These organisms need to consume other organisms, like phytoplankton, to survive. While phytoplankton are the base of the food web, zooplankton are the next level.These animals take energy from phytoplankton and then they themselves become food for larger marine life.he question is actually harder than students think, because plankton can be small, they can be big, they can be plants, and they can be animals. Plankton are not just one thing, they are a lifestyle, a way an organism lives in its environment. Plankton are drifters, meaning they cannot move against a current.