Name: 

A light microscope that has two or more lenses is called a(n) ____________________ microscope.

A microscope allowed Hooke to see “tiny rectangular rooms,” which he called ____________________.

Cells are the basic units of structure and ____________________ in living things.

According to the cell theory, all organisms are made of ____________________.

The sharpness of an image produced by a microscope is called ____________________.

A lens that is thicker in the center than at the edges is called a(n) ____________________ lens.

The nucleus of a cell has thin strands of ____________________ that contain genetic material.

Small grainlike bodies called ____________________ produce proteins inside cells.

Organelles known as ____________________ contain chemicals that break down food particles and old cell parts.

Unlike in an animal cell, the genetic material in a bacterial cell is not found in a(n) ____________________.

A structure found in plant and bacterial cells but not in animal cells is the cell ____________________.

A(n) ____________________ is a group of similar cells that work together to perform a specific function.

Sugars and starches are examples of organic compounds known as ____________________.

DNA and RNA belong to the group of organic compounds known as ____________________.

Oxygen molecules move across cell membranes through a process called ____________________.

The diffusion of ____________________ molecules through a selectively permeable membrane is called osmosis.

Unlike passive transport, active transport requires the cell to use its own ____________________.

Small molecules called ____________________ make up proteins.

Since carbon cannot be broken down into simpler substances, it is an example of a(n) ____________________.

When two or more elements combine chemically, they form a(n) ____________________.

Use the diagram to answer each question.

Name two structures that are not found in the cell shown here but that are found in plant cells.

Structure A is a Golgi body. Describe its function.

Identify the structures labeled B and describe their function.

Identify structure C and describe its function.

Identify the large round structure labeled D and describe its function.

Is the cell shown a bacterial cell? Explain your reasoning.

Use the diagram to answer each question.

Explain what would happen if some of the red blood cells were placed in beaker A.

Explain what would happen if some of the red blood cells were placed in beaker B.

In the human body, blood cells float in a watery liquid called plasma. Explain what would happen if some of the red blood cells were placed in beaker C.

Suppose the test tube contained plant cells instead of red blood cells. What would probably happen to the cells if they were placed in beaker A?

If the test tube contained plant cells, what would probably happen to the cells if they were placed in beaker B?

Many single-celled organisms that live in fresh water have contractile vacuoles, which remove excess water from their cytoplasm. Why does the environment in which these organisms live make contractile vacuoles important?