Which is a nonmetallic mineral source? coal, iron , aggregate, wood

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

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?

Which soil would most likely be found in the arctic? andisols gelisols histosols spodosols