How can scientists use half-life to help date new rocks and fossils that are found?

Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.

What must be true for natural selection to heppen

As a small change in a person's dna can cause a genetic disorder