B. A model cannot show real life conditions. This is so because models aren't alive.
The answer is B. Natural selection will find a way to affect one, then that one will affect many others.
Answer:
By definition, tissues are absent from unicellular organisms. Even among the simplest multicellular species, such as sponges, tissues are lacking or are poorly differentiated. But multicellular animals and plants that are more advanced have specialized tissues that can organize and regulate an organism’s response to its environment.
The answer is the nucleus
