How did the discovery of the electron change the atomic model? O A. It disproved the earlier idea of an indivisible atom.
O
B. It confirmed that atoms are very tiny.
O
C. It exposed fraudulent experiments conducted by unqualified scientists.
O
D. It proved that atoms are easier to see than once believed.

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.