Question

1. what is the smallest unit of life?

a. bacteria colonies
b. cells
c. atoms
d. ribosomes

1. cell theory establishes which of the following conclusions about cells?

a. all cells have the same size and shape.
b. all cells form by free - cell formation.
c. all cells are produced by other living cells.
d. all cells have a cell wall.

Explanation:

For question 1:

• Bacteria colonies are groups of bacteria (which are made of cells), so they are not the smallest unit.
• Atoms are non - living and are part of the composition of cells.
• Ribosomes are cell organelles, which are parts of cells.
• Cells are the basic structural and functional units of life.

For question 2:

• Cell theory states that all cells come from pre - existing cells (all cells are produced by other living cells).
• Cells can vary in size and shape (so option a is wrong).
• Free - cell formation is not a part of modern cell theory (option b is wrong).
• Not all cells have a cell wall (animal cells do not have a cell wall, for example), so option d is wrong.

Answer:

1. b. Cells
2. c. All cells are produced by other living cells.