Junior Biology study guide. Notes of various biology topics and biology terms. Topics included: # Living Things. # Cells. # Food. # Digestion and Enzymes. # The Circulatory System. # Respiration & Breathing. # Excretion. # Human Reproduction. # Skeletal & Muscular Systems. # Nervous System. # Genetics. # Microbiology & Biotechnology. # Ecology. # Photosynthesis.