What is the leading cause of death in the usa

Water pollution cannot only affect the earth's water supply but it can also affect the soil true or false

Which of the following is the definition of ventilation as it relates to the respiratory system?

Which of the following supports the argument that viruses are nonliving? a) they are not cellular.b) their dna does not encode proteins.c) they have rna rather than dna.d) they do not evolve.