2.3 Notes

Multiple Choice

What is the definition of a cell?

• A cell is a type of tissue in the body.
• A cell is the basic unit of structure and function in living things.

• A cell is a small organ that performs specific functions.
• A cell is a collection of molecules that cannot replicate.

Multiple Choice

Some functions of organisms include

• obtaining oxygen and food, getting rid of waste, growing

• Sensation, mutation, aging
• Communication, adaptation, excretion
• Photosynthesis, digestion, locomotion

Fill in the Blanks

Until the late 1600s, no one knew cells existed because there was no way to

them.

Fill in the Blanks

The invention of the

made it possible to discover and learn about cells.

Multiple Choice

What is the difference between a simple and compound microscope?

• The main difference is that a simple microscope has one lens, whereas a compound microscope has two or more lenses.
• A simple microscope has a fixed focus, whereas a compound microscope has adjustable focus.
• A simple microscope is used for viewing large objects, while a compound microscope is for small objects.
• A simple microscope uses a mirror, while a compound microscope uses a light source.

Multiple Choice

Who was the first person to observe cells? He determined that these cells were no longer living.

• Anton van Leeuwenhoek
• Louis Pasteur
• Gregor Mendel
• Robert Hooke

Multiple Choice

Who was the first to observe unicellular organisms? He built a simple microscope.

• Robert Hooke
• Louis Pasteur
• Charles Darwin
• Antonie van Leeuwenhoek

Multiple Choice

What did Matthias Schleiden conclude regarding cell theory?

• All animals are made of cells.
• Only some plants are made of cells.
• Cells are not the basic unit of life.
• All plants are made of cells.

Multiple Choice

What did Theodor Schwann conclude regarding cell theory?

• Only multicellular organisms are made of cells.
• All cells are identical in structure and function.
• Cells can arise spontaneously from non-living matter.
• All animals are made up of cells. Therefore all living things are made of cells.

Multiple Choice

What did Rudolf Virchow contribute to the cell theory?

• All cells arise from pre-existing cells.
• All cells are identical in structure and function.
• Cells can spontaneously generate from energy.
• All cells are created from non-living matter.

Multiple Select

The cell theory states the following (mark all that apply):

• All living things are made of cells.

• All cells are made up of many cells.

• All cells are produced from existing cells.

• Cells are the basic unit of structure and function in living things.

Multiple Choice

How do compound light microscopes produce an image?

• They rely on ultraviolet light to illuminate the specimens.
• They function by reflecting light off the surface of the specimens.
• They use a single lens to magnify specimens through electron beams.
• Compound light microscopes work by using multiple lenses to magnify specimens through light transmission.

Multiple Choice

How do you calculate total magnification?

• Total magnification = Objective magnification x Eyepiece magnification
• Total magnification = Objective magnification + Eyepiece magnification
• Total magnification = Objective magnification / Eyepiece magnification
• Total magnification = Eyepiece magnification - Objective magnification

Multiple Choice

Define resolution (in magnification):

• Resolution is the ability to clearly distinguish the individual parts of an object.

• Resolution is the size of the lens used in magnification.
• Resolution is the total magnification of an image.
• Resolution refers to the brightness of a magnified image.

Multiple Choice

How does an electron microscope produce an image?

• It captures images using sound waves.
• It uses visible light to magnify the sample.
• An electron microscope produces an image by using a beam of electrons instead of light.

• It relies on chemical reactions to create images.