Biology: Introduction to Cell Theory

Who is credited with creating the first compound microscope?

• Louis Pasteur

• Zacharias Janssen

• Robert Hooke

• Antonie van Leeuwenhoek

What did Robert Hooke observe under his microscope that led to the term 'cell'?

• Water droplets

• Bacteria

• Animalcules

• Cork

What did Antonie van Leeuwenhoek call the living organisms he observed in water?

• Bacteria

• Animalcules

• Cells

• Protozoa

Which two scientists are credited with establishing the first two points of classical cell theory?

• Antonie van Leeuwenhoek and Louis Pasteur

• Rudolph Virchow and Robert Remak

• Robert Hooke and Zacharias Janssen

• Mattias Schleiden and Theodore Schwann

What experiment by Louis Pasteur disproved the idea of spontaneous generation?

• Microscope invention

• Cork cell study

• Animalcule observation

• Swan necked flask experiment

Who is credited with the idea that all cells come from pre-existing cells?

• Mattias Schleiden

• Rudolph Virchow

• Antonie van Leeuwenhoek

• Robert Hooke

What is the smallest unit that can be considered alive?

• Tissue

• Organ

• Cell

• Organism

Which organisms are made up of only one cell?

• Animals

• Unicellular organisms

• Multicellular organisms

• Plants

What is a key feature of modern cell theory?

• Cells can arise spontaneously

• Cells are not the basic unit of life

• DNA can be transferred between cells

• Cells do not require energy

What is the estimated number of cells in a human body?

• Thousands

• Millions

• Billions

• Trillions