How long could an astronaut survive on mars without a spacesuit. would she suffocate, boil, or freeze to death?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

The tubes transporting minerals and water upward are called ?

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass