What produces toxic chemicals in the body?

Free brainliest! what is a characteistic of the american stradfordshire?

Which of the following will a bacterium produce when a human gene is added to its genome? question 4 options: human carbohydrates a protein made up of both human and bacterial properties the human protein coded for by the human gene human plasmids that can be isolated from the bacterium

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.