Name two life processes which help living organisms to procure food?
For Plants: Photosynthesis
For Animals: Cellular Respiration
Your answer could apply to any of the three following situations: Ecology is the study of the relationships between living organisms and their environment Coniology is the study of dust in the atmosphere and its effects on living organisms Actinobiology is the study of the effects of radiation upon living organisms
Yeast is not a chemical element, nor a compound, yeast is a living organism, a member of the Kingdom Fungi, this is eukaryotic microorganisms. They are generally unicellular organisms, but they can also form multicellular forms. They are useful for many processes human do because of the fermentation, which is the process that converts carbohydrates to carbon dioxide and alcohol.
As the name says it, "muliticellular" organisms are constructed of more than one cell while "unicellular" organisms are constructed of only one cell. For example, organisms like mammals, amphibians even humans are made up of millions of cells while organisms like Viruses or Bacteria are only made up of a single cell that carry out all the basic life processes.