Stem cells are cells that can differentiate into many different kinds of cells. scientists have discovered that the environment supporting the cells influences stem-cell differentiation. for example, stem cells grown on strong, flexible surfaces became muscle cells. what most likely happened to stem cells grown on a hard, rigid surface?

Galaxy whose shape seems different follow no set pattern are classified as

What effect does plate tectonics have an organic evolution

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism