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Question: crosssection of a rhizobium nodule and study it under the...

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cross-section of a Rhizobium nodule, and study it under the microscope, using information from your instructor to interpret what you see. Make a labeled drawing below. Then, obtain a single nodule from the root of a piece of tissue from the center, and crush the piece of tissue in a few drops of water on one side of a glass slide. Make a smear on a nearby part of the glass slide by using a sterile inoculating loop to transfer a large drop of the water, allowing it to air dry, and then heat-fixing it over a Bunsen burner. Stain the smear with crystal violet, and then study the bacteria in the smear under a com- epre- b. Rhizobium. First obtain a prepared slide of a leguminous plant. Slice open the nodule, remove a small pound light microscope, using the 40x and 100x (oil immersion) lenses. Make ar sentative sketch below. Can you see corresponding cell types between your two different specimens of Rhizobium? Copy a representative drawing of the cell shape of Rhizobium onto the back of your Rhizobium flashcard. 4. Phylum Cyanobacteria Anabaena. Obtain a prepared slide of Anabaena, and study its morphology under a com- pound light microscope, using the 40x and 100x (oil immersion) lenses. Make a r sentative sketch below, and then copy it onto the back of your Anabaena flashcard. Make sure to label the heterocysts, where nitrogen-fixation takes place. a. epre-
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