Research the following problem using a search engine such as www.altavista.com or www.google.com. Please avoid doing searches with AOL, Ask An Expert, or Ask Jeeves. They do not provide the full breadth of Websites needed to investigate scientific topics. Before pursuing this activity, first come up with a list of key words or phrases you would need to perform an accurate and concise search.
Bacteria, yeast and animal cells are commonly used to express genes that produce proteins of commercial value. Explain why many geneticists are proposing the exclusive use of plant cells to produce human pharmaceutical chemicals.
