Supplies Per Group To begin, you will need a Relationships and Biodiversity Lab Kit per lab group. Unfortunately the kits are overpriced and under-stocked in terms of the materials you will need. Provide a biological explanation for the common characteristics that these species share. Biodiversity ensures the availability of a rich variety of genetic material that may lead to future agricultural or medical discoveries having significant value to humankind. Too much solution would wash away the pigment, if the spots were too high the colors would not have room to separate, if the spots were too close together the results would be jumbled together.
Test 2—Structural Characteristics of Seeds a. As diversity is lost, potential sources of these genetic materials may be lost with it. Also remove the white paper to the left and right of the string of letters. The test using the pigments and water. The chromatography paper must be removed from the cup before the water line reaches the pencil labels at the top of the chromatography paper While the plant extracts are moving in the chromatography paper, go on to Test 5, but keep checking on the progress of the water moving up the paper so that you can remove it at the proper time. Test 6 — Simulated Gel Electrophoresis Identical banding pattern in both Botana curus and Species Z. Carefully pour solutions from the chromatography cup into the waste container.
Reminder: Complete the chromatography tests and observations before going on. It is not absolutely necessary to get this item but I believe that it will help organize students as they complete each step of the lab. Disruptions in the numbers and types of one species can upset ecosystem stability. Repeat the test for enzyme M using the other plant extracts. Record your observations in Table 1. Simulate this cutting process as follows: b1.
Record your observations in the data table. Remove one of the colored paper strips from the plastic bag labeled Botana curus. You will test your hypothesis by completing additional tests in the second part of this laboratory activity. Test 1 — Structural Characteristics of Plants Species Z as it has the same kind of parallel veination in the leaves. Therefore, lines are drawn below where each strip should be cut. The Biodiversity Crisis Plant and animal species are being lost at a rate that is unprecedented in the history of life.
Which kind of evidence—structural or molecular—is most helpful in making decisions about relationships between species? Then, count up the number of bases and paste appropriately in the simulated Gel Electrophoresis table on the next slide. You will need to keep them for review before the Regents Examination. Clean the microtip droppers thoroughly by rinsing them with water. These are very easy to make so it need not be a huge concern. Record your observations in the data table. Use the lowest magnification on your microscope to examine the slides that show cross sections through stems of Botana curus and Species X.
Use a pencil to label the top edge of the chromatography paper Bc Botana curus , X. Record your observations in Table 1. Based on your data for structural relationships, which species X, Y, or Z would you hypothesize is most likely to produce Curol? Human activities are responsible for much of this biodiversity crisis. Overhunting, introduction of foreign species that compete with native species, and removal of predators have also played a significant role in endangering some species. State three reasons why it might be important to preserve Botana curus. Every population is linked, directly or indirectly, with many others in an ecosystem.
Important Note: Record all of your data and answers on these laboratoty sheets. Guided Student Notes An item that will aid students in completing this lab is the Student Guided Notes. Human activities such as destruction of natural habitats and pollution are thought to be the major environmental factors causing the decline of species, but others are also important. State three examples of human activities that could endanger Botana curus. Scientists frequently use branching tree diagrams to represent graphically the relationships between species.
Use a clean microtip dropper to add 5 drops of Botana curus extract to the indicator powder. Test the plant extract from Botana curus for the presence of enzyme M. Assume that the plant you identified as being closely related to Botana curus grows rapidly, survives in many environments, and produces Curol. Clean the microtip droppers thoroughly by rinsing them with water. Compare the arrangement circular or scattered of the bundles of conducting tissue in the specimens. Based on your observations, list three characteristics structural or molecular that all four species have in common. Test Most similar to Botana curus? Explain why or why not.
News reports indicate that Botana curus plants may become extinct unless expensive efforts are made to preserve the species. Add just enough water to cover the bottom of the cup approximately 1cm deep. A fizzing reaction indicates that enzyme M is present. Test 3 — Microscopic Internal Structure of Stems Species Z vascular bundles closely resemble those of Botana curus. Test 3—Microscopic Internal Structure of Stems a. Once the chromatography is done, record your observations of the colors and relative amounts of pigments in Table 1 i. State two additional kinds of evidence you might use to further support your hypothesis about the relationship between Botana curus and species X.