Methods of estimating population density

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from