What are homologous body structures and what do they tell us about evolution?

Are substances released into the environment that in excess amounts cause damage

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

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates