A student drew atomic models of four elements. Based on these drawings, which element is the least reactive

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.

What does the positioning of transcription factors determine?

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?