Science Fair Ideas - Biology

• Insects such as bees and butterflies. Observations on life cycle, feeding habitats, populations.
• Affect of fertlilser on plants
• Carniverous plants - how they trap insects and digest them
• Why plants grow towards light
• The effect of light intensity on plant growth
• The effect of sound on plants (at different frequencies?)
• The effect of carbon dioxide levels on plant growth
• The effects of gravity on seed germination
• Transpiration and how water moves through the plant
• Plant reproduction - sexual and asexual
• The effect of different colours of artificial light on plant growth 
• Hydroponics experiments
• Crime Scene Investigation our award winning CSI course requires some applications of biology
• The effectiveness of Antiseptics and soaps on household bacteria 
• Conditions necessary for the life of a brine shrimp 
• Conditions for optimal edible mushroom production
• Nitrogen fixation in clover seedlings with and without symbiotic Rhizobium bacteria
• Presence and distribution of Caulobacter in waterways and drinking supplies
• Field Studies - plant and animal life in the school grounds, a creek or stream, a grassy field, a tree, a home garden, a balanced aquarium, during winter. - diets of various animals 
• A chemical analysis of the extraction and make up of DNA
• Experimenting with various biomolecule separation techniques (e.g. electrophoresis) 
• Factors affecting the production of alcohol during anaerobic fermentation
• The effect of alcohol on proteins and cell function
• Effect and toxicity of alcohol on living systems (Humans)
• Producing mutations in bacteria, yeast, protozoa or molds 
• Experimenting with microbial degradation of petroleum 
• Isolation of luminescent Photobacterium from seawater
• Reaction of Paramecium to pH variations, light and temperature conditions 
• Sugar level in plant sap at different times and dates 
• A study of territoriality in mice 
• Studies of memory span and memory retention 
• Age versus learning ability 
• Observation of conditioned responses in different animals 
• Design and test a simple datalogging device for biology experiments.  Perhaps a good PICAXE project?
• Photograph images from a microscope
• A study of the relation between physical exercise and learning ability 
• A study of the percentage of DNA (by weight) in different species 
• Factors affecting the enzyme's reaction rates 
• Effects of cigarette smoke on the growth of plants 
• The effects of phosphates on aquatic plants 
• A study of the tumours produced in plants by Agrobacterium tumifaciens and similarities to root nodule formation in clover by Rhizobium
• The effects of electric fields on plant root cell mitosis
• The effects of magnetic fields on plant growth 
• The effects of X-ray and other radiation on plants 
• Study of population fluctuations in insects 
• A study of toxicity of insecticides versus temperature 
• A study of diffusion through cell membranes 
• Growth of plant and animal cells by cloning or tissue cell culture