1. Many external environmental factors affect the growth of bacteria. List and explain 2 features that make the human body an ideal “home” for bacteria. (4 points) Solution Environmental factors which affects bacterial growth includes 1. Temperature 2. pH 3. Moisture 4. Oxygen TEMPERATURE is important for growth and multiplication of bacteria. Most of them need warm temperatures for their survival and as human body has a maintained temperature of around 37°C it providers ideal environmental conditions for their growth. pH is important for bacterial growth. Highly acidic environment hamper their growth. They prefer to multiply near to neutral pH and pH of human blood being near to 7.0 it provides best environment for their growth..