GR8 SCIENCE CELL THWEORY

Scientists unveiled the mysteries of the miniature universe by using which tool?

• Microscope

• Telescope

• Stethoscope

• Periscope

The importance of the cell theory is that it:

• states that all living things are made up of cells

• explains how cells produce energy

• describes the structure of DNA

• shows how organisms evolve over time

Some of the earliest tools and techniques humans used to observe small objects include:

• Simple magnifying glasses and early microscopes

• Telescopes and binoculars

• Digital cameras and smartphones

• X-ray machines and MRI scanners

Antoinne van Leeuwenhoek was known for his contributions to the field of microscopy.

• He developed powerful microscopes and discovered microorganisms.

• He invented the telescope and studied planets.

• He created the first vaccine for smallpox.

• He discovered the laws of motion.

The term 'cell' was given by:

• Robert Hooke

• Anton van Leeuwenhoek

• Theodor Schwann

• Matthias Schleiden

The development of the microscope transformed our understanding of the natural world by allowing us to:

• Observe microorganisms and cells that are invisible to the naked eye.

• See distant planets and stars in greater detail.

• Measure the speed of light accurately.

• Predict weather patterns with precision.

The three principles of Cell Theory and their proponents are:

• All living things are composed of cells, cells are the basic unit of life, and all cells come from pre-existing cells; proposed by Schleiden, Schwann, and Virchow.

• Cells are only found in animals, cells are the smallest molecules, and cells can form spontaneously; proposed by Pasteur and Koch.

• Cells are made of non-living material, cells do not divide, and cells are only in plants; proposed by Hooke and Leeuwenhoek.

• Cells are invisible to microscopes, cells are not the unit of life, and cells can live independently; proposed by Mendel and Darwin.

Some of the earliest tools and techniques humans used to observe small objects include:

• Simple magnifying glasses and early microscopes

• Telescopes and binoculars

• Digital cameras and smartphones

• X-ray machines and MRI scanners

Antoinne van Leeuwenhoek was known for which of the following contributions to the field of microscopy?

• He developed powerful microscopes and discovered microorganisms.

• He invented the telescope and studied planets.

• He created the first X-ray machine.

• He discovered the structure of DNA.

Leeuwenhoek’s microscopes differed from earlier magnifying tools in which way?

• They had much higher magnification and better lenses.

• They were made entirely of wood.

• They could only be used in sunlight.

• They were the first to use electricity.