According to most scientific models, how many years ago did the first simple cells appear on earth? a) 400,000 b) 4 million c) 400 million d) 4 billion

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?

The condition in which joints are inflamed is bursitis select the best answer from the choices provided ot f

Si el equipo no fuera bueno no con el entrenador.