Unit 1

What is the first step of the cell theory?

• All living organisms are made of cells

• Cells are the basic unit of life

• Cells come from pre-existing cells

• Cells are tiny

What is the second step of the cell theory?

• all living organisms are made of cells

• cells are the basic unit of life

• cells come from pre-existing cells

• cells are tiny

Who discovered cells by looking at a piece of cork through a microscope?

• Mathias Schleiden

• Theodore Schwann

• Robert Hooke

• Albert Einstein

What is the third step of the cell theory?

• all living organisms are made of cells

• cells are the basic unit of life

• cells come from pre-existing cells

• cells are tiny

What type of cell is shown?

• Plant cell

• Animal cell

• organelle

• this is not a cell

Which of the following is a characteristic of a prokaryotic cell?

• has membrane-bound organelles

• has a nucleus

• does not have a nucleus

• contains more than one type of cell

Animals are eukaryotic

• true

• false

Which organelle is NOT found in an animal cell?

• cytoplasm

• nucleus

• cell membrane

• cell wall

Which type of cell contains a cell wall and chloroplasts (plant or animal)

Which organelle is known as the powerhouse of the cell because it gives the cell energy and power?

• nucleus

• mitochondria

• cell wall

• vacuole