Part A: Observing Roots
(Score for Question 1: Click or tap here to enter text. of 10 points)
1. Record your observations of the roots of the bean and radish plants in the appropriate data chart. Be sure to include a sketch of each plant’s roots.
Data Chart: Bean Plant
Roots of bean Plant Observations
Nodules present? Click or tap here to enter text.

Number of nodules Click or tap here to enter text.

Number of pink nodules Click or tap here to enter text.

Number of green nodules Click or tap here to enter text.

Sketch roots and nodules here or on a separate piece of paper Click or tap here to enter text.

Data Chart: Radish Plant
Roots of Radish Plant Observations
Nodules present? Click or tap here to enter text.

Similarities to bean roots Click or tap here to enter text.

Differences from bean roots Click or tap here to enter text.

Sketch roots here or on a separate piece of paper Click or tap here to enter text.

Part B: Observing Rhizobium with a Hand Lens
(Score for Question 2: Click or tap here to enter text. of 5 points)
2. Sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Part C: Observing Rhizobium with a Microscope
(Score for Question 3: Click or tap here to enter text. of 5 points)
3. Sketch the bean nodule, labeling cells with and without Rhizobium, showing what you observed with the microscope.

Conclusions
(Score for Question 4: Click or tap here to enter text. of 2 points)
4. Two new species of plants were introduced into an area that was low in available nitrogen compounds in the soil. One formed nodules and one did not. Which species would you reasonably expect to grow more robustly? Explain.

(Score for Question 5: Click or tap here to enter text. of 2 points)
5. How does the location of the nodules relate to the function of the nodule? Explain.

(Score for Question 6: Click or tap here to enter text. of 2 points)
6. This diagram shows two groups of plant cells, one with Rhizobium and one without the bacteria. Label which is which, and explain the obvious size difference, using observations from Part C of the lab in your answer.