What is the single most important factor that defines desert biomes? why are deserts divided into different types?

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical?

What is the similarities and differences between bacteria and eukaryote?

Give an example of a trait that is controlled by more than one gene.