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.
Plankton are an important source of food for larger animals. Phytoplankton are the first link in the food chain. They are known as primary producers because they produce the first forms of food.Zooplankton and other small animals that graze on the phytoplankton are known as primary consumers.These, in turn, become food for larger organisms such as bivalves, crustaceans and fish. The fish and other animals then become food for animals near the top of the food chain, such as harbor seals and man.ooplankton and other small animals that graze on the phytoplankton are known as primary consumers. These, in turn, become food for larger organisms such as bivalves, crustaceans and fish. The fish and other animals then become food for animals near the top of the food chain, such as harbor seals and man.