Nan is pregnant with her first child. she just found out that the baby has grown one pound since her last doctor's appointment. she is in the period of prenatal development.

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

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.

The response is the basis for vaccination. primary secondary tertiary none of the above