What is found in rocks that are 3.5 billion years old?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

What are some natural processes that represent physical and chemical changes?

Ascientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. which biological component would be best to use as a model for the pill's function? bacteriocytes phagocytes complement antibodies