Which of the following is NOT a principal of the cell theory?

• Cells are the basic units of life.
• All living things are made of cells.
• Very few cells are able to reproduce.
• All cells come from preexisting cells.

Looking at a cell under a microscope, you note that it is a eukaryote. How do you know?

• The cell lacks cytoplasm.
• The cell lacks a cell membrane
• The cell has a nucleus.
• The cell lacks genetic material.

Which of the following enclose their DNA in a nucleus?

• prokaryotes
• bacteria
• eukaryotes
• viruses

Not all cells are alike. Which of the following is NOT a true statement about differences between cells?

• Some cells have a nucleus, some do not.
• Most cells have a membrane, but some do not.

Which of the following conclusions could you draw about this cell shown.

• The cell is eukaryotic because it has a nucleus.
• The cell is prokaryotic because it has a nucleus.
• The cell is an eukaryotic because it does not have a nucleus.
• The cell is prokaryotic because it does not have a nucleus.

Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?

• The cell lacks cytoplasm.
• The cell lacks a cell membrane
• The cell lacks a nucleus.
• The cell lacks genetic material.

Which of the following conclusions could you draw about this cell shown.

• The cell is eukaryotic because it has a nucleus.
• The cell is prokaryotic because it has a nucleus.
• The cell is an eukaryotic because it does not have a nucleus.
• The cell is prokaryotic because it does not have a nucleus.

The primary function of the cell wall is to

• support and protect the cell.
• store DNA.
• direct the activities fo the cell.
• help the cell move.

Unlike the cell membrane, the cell wall is

• found in all organisms.
• composed of a lipid bilayer.
• selectively permeable.
• rigid.

You will NOT find a cell wall in which of these kinds of organisms?

• plants
• animals
• fungus
• bacteria