A microscope is needed in order to study cells because:

• cells are too small to be seen with the naked eye.

• cells are brightly colored and easy to see.

• cells are always moving quickly.

• cells can only be seen at night.

Fill in the blank: ______ is the basic unit of structure and function in all living things.

• Cell

• Tissue

• Organ

• Organism

Fill in the blank: ______ is an instrument that makes small objects look larger.

• Microscope

• Telescope

• Stethoscope

• Barometer

What does it mean to say that cell is the basic unit of structure in living things?

• All the living things made up cell.

• Cells are only found in plants.

• Cells are not important for life.

• Only animals have cells.

What does it mean to say that the cell is the basic unit of function in living things?

• All the living things' cells function to survive.

• Cells are only found in plants.

• Cells are not important for life.

• Only animals have cells.

What is a theory?

• Explanation of natural bodies by an experiment.

• A random guess without evidence.

• A list of scientific laws.

• A mathematical calculation.

What are living things built out of?

• Cells.

• Rocks.

• Water.

• Air.

Where do all cells come from?

• From other cell.

• From rocks.

• From sunlight.

• From water.

Where did the old Hooke's theory come from?

• From a thin slice of cork.

• From a piece of wood.

• From a drop of water.

• From a metal rod.

What other product of a tree do you think is made up of the wall of cell that are no longer living?

• A branch of the tree.

• A leaf of the tree.

• A fruit of the tree.

• Tree sap.