What calcium-rich formation builds the internal skeleton of echinoderms?

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation

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.