Heterottophic bacteria can create their own food

Environmental differences within ecosystems are generally caused by

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.

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above