How are viruses different from bacteria? Bacteria are heterotrophic, while viruses are autotrophic.
Bacteria are living organisms; viruses are not.
Bacteria have a membrane-bound nucleus, while viruses do not.
Bacteria are multicellular; viruses are single cells

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger