Definition. Respiration is the metabolic process of most living things in which food molecules (glucose) are turned into usable energy for the cell (ATP). It is the anti-process to photosynthesis, in which plants use sunlight and carbon dioxide to build food molecules, releasing oxygen as a waste product.During aerobic respiration, oxygen is present, and helps the process to crank out energy very efficiently.Some organisms can also undergo anaerobic respiration, in which oxygen is absent and a somewhat less efficient method of metabolism takes place.t is the anti-process to photosynthesis, in which plants use sunlight and carbon dioxide to build food molecules, releasing oxygen as a waste product. During aerobic respiration, oxygen is present, and helps the process to crank out energy very efficiently.
Definition of facilitate for English Language Learners : to make (something) easier : to help cause (something) : to help (something) run more smoothly and effectively
verb. Refer is defined as to direct to for something needed, or to make a reference. 1  An example of refer is for a woman to suggest that her friend visit a specific doctor. 2  An example of refer is to include an in-text citation in a research paper.o serve as a descriptor or have as a denotation: The word chair refers to a piece of furniture. 1  To speak or write about something briefly or incidentally; make reference: referred during our conversation to several books he was reading. 2  To turn one's attention, as in seeking information: refer to a dictionary.