Investigate each of the three components of cell theory to investigate from the corkboard in the virtual lab: All organisms are composed of cells.
Cells come from existing cells.
Cells are the basic unit of life.
For each section, record your observations below.
Complete your report and submit it for grading.

Data and Observations:
Investigation: All organisms are composed of cells.

What is the main function of each part of the compound microscope?

Part

Function

Eye piece

Ocular lens

Objective lenses

Slide

Cover slip

Stage

Focusing dials

Light

Condenser lens

Observe each specimen under the microscope, and record a description about its appearance.

Specimen Type

Description

Plant cell

Animal cell

Bacteria cell

Investigation: Cells come from existing cells.

Observe the two flasks, and record information about their appearance.

Day

Flask with open (broken) neck

Flask with intact neck

1

2

3

4

5

Investigation: Cells are the basic unit of life.

Observe the two petri dishes, and record information about their appearance.

Day

Petri dish (on left) containing agar plus nutrients

Petri dish (on right) containing agar without nutrients

1

2

3

4

5

Conclusion:
Use your data to answer the following questions. Use complete sentences, and be as detailed as possible.

How did scientists discover that all living things are made of cells?
How did Pasteur’s experiment with the flasks help disprove the idea that living things could just appear or come from nonliving things like water and air?
Why are nutrients needed for living things? Describe the difference between living and nonliving things.