Why do adult stem cells currently have fewer uses in therapeutic cloning than embryonic stem cells? A. Adult stem cells have more restrictions that prevent them from reentering the cell cycle at the G0 stage. B. Embryonic stem cells have longer telomeres and persist for much longer than adult stem cells. C. Adult stem cells may become any type of cell, whereas embryonic stem cells may only become adult stem cells first. D. Embryonic stem cells may become any type of cell, whereas adult stem cells may only become a limited number of cell types

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos