Which resource is trapped in porous rocks and is the most important energy source produced in california?
a) oil
b) coal
c) calcium
d) natural gas

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

Why do bacteria thrive even in hostile environments

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?