Plants, microorganisms, and animals
Because it’s time consuming and money consuming to observe from space so models are required
A physician who specializes in treatment of the gums is called a periodontist.
Nucleus, mRNA, Rough ER, Ribosome, Golgi Body, Cell Membrane.
This question is kind of tricky since a protein would be within the nucleus AS an mRNA sequence and within the rough ER WITHIN a ribosome.