Gr.9 Revision Ch.8

What is the basic unit of structure and function in living things?

• Tissue

• Atom

• Cell

• Molecule

Who was the first person to observe living cells through a microscope?

• Robert Hooke

• Anton van Leeuwenhoek

• Rudolf

• Theodor Schwann

What does cell theory state about all living things?

• All living things are made of organs.

• All living things are made of tissues.

• All living things are made of cells.

• All living things are made of atoms.

What is the function of a microscope?

• To measure temperature

• To produce a magnified image

• To produce sound

• To analyze chemical composition

What did Robert Hooke observe in tree bark?

• Living cells

• Bacteria

• Dead cells

• Viruses

What is the role of Rudolf in cell theory?

• He studied plant cells.

• He observed living cells.

• He discovered the microscope.

• He stated that cells are made of other cells.

What type of microscope uses beams of electrons?

• Light microscope

• Electron microscope

• Simple microscope

• Compound microscope

Which of the following is a component of cell theory?

• Cells are only found in plants.

• All new cells are produced from existing cells.

• Cells do not perform functions.

• Cells can be created from nothing.

What is the main function of a cell?

• To grow larger

• To create energy

• To perform functions necessary for life

• To reproduce only

What is the difference between light microscopes and electron microscopes?

• Light microscopes use light; electron microscopes use sound.

• Light microscopes have lower resolution than electron microscopes.

• Electron microscopes are simpler to use.

• Light microscopes can only see dead cells.