A substance that a living thing
needs to sustain life.
Closed or Heterotroph

Nucleic acid certain protein cell membranes certain carbohydrates

In a cladogram' when does a group of organisms branch off

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