• You will be provided with a citrus fruit to observe.
• Use your senses to observe the citrus fruit in front of you.
• Make notes on everything you observe in the Lab Report (Part A #1a & 1b).
• Include description of size, color, shape, etc...
• As you make observations use anatomical terms discussed in the Lab Manual and be specific.
• Quantify wherever possible.
• The hand lens allows you to see more details.
• It magnifies the object 10x.
• Use the hand lens to re-examine the fruit in front of you and record your observations in the Lab Report.
• As you make observations use anatomical terms discussed in the Lab Manual and be specific.
• Make sure you have observations for BOTH interior and exterior anatomy and that you observe something you could not see with your naked eye.
• The Dissecting microscope allows you to see even more details.
• It magnifies the object 8x to 32x its normal size.
• Use the Dissecting Microscope to re-examine the fruit in front of you. Record in your Lab Report (Part B #4a, 4b & 5)
• As you make observations use anatomical terms discussed in the Lab Manual and be specific.
• Make sure you have observations for BOTH interior and exterior anatomy and that you observe something you could not see with your naked eye or the hand lens..
• Observe the other citrus fruits in the lab, and in figure 4 below and answer the questions the in the Lab Report.
• Using your common knowledge of an apple, and the image of an apple below, answer questions in Part C of the Lab Report.
Figure 4
• For the pre-lab you watched a video (there is a link to the same video below if you need to refresh your memory) and came up with a hypothesis for where the mass of a plant comes from.
• Here we will set up an experiment to test if most of the mass of a plant comes from the soil as Jan Baptist van Helmont thought.
• We will use the data that we collect in this lab, and additional data collected in Lab 4 after the plant has grown, to see if our experiment supports our hypothesis or if we need to reject this hypothesis.
• To test to see if most of the mass of a plant comes from the soil you will need the following materials:
- Styrofoam cups.
- Soil
- Balance
- Bean seeds
- Water
- Pencil
• Follow your instructors’ directions and Complete Table 1.2 in the Lab Report.
• Answer the remaining questions in the Lab Report.
Before you leave
- Clean-up and neaten your laboratory space.
- Wipe the laboratory table with disinfecting wipes.
- Using dampened lens paper, wipe the lenses of the microscope to remove any residual juice from the citrus fruits that may be on the microscope stage.
- Return all scopes, balances, lens, etc... to their proper location.
Non-majors College Biology Lab Manual © 2021 by Marie McGovern Ph.D. is licensed under CC BY-NC 4.0