Book an Appointment with a Doctor Online Today. Quick and easy process; No need to wait on hold for an appointment; Continue
2.Examples of density dependent factors are food, shelter, predation, competition, and diseases while examples of density independent factors are natural calamities like floods, fires, tornados, droughts, extreme temperatures, and the disturbance of the habitat of living organisms.
Procedure. 1. The independent variables in this science fair project are the temperature and species of bacteria-E Coli, Streptococcus or Bacillus. The dependent variable is the size of bacteria growth after five days, which is determined by measuring the size of bacterial growth with a ruler.bservation. Bacteria that were exposed to temperatures of 60 degrees Celsius and 100 degrees Celsius were observed not to have any growth when transferred to the Petri dishes, whereas bacteria exposed to -78 degrees Celsius and 0 degrees Celsius were observed to have a significant amount of growth.