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 Blank

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

Fill in the Blank

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.