Pavel Tislenok Lab Bio 100 week 8 Frog’s dissection 1. First we gathered all tools for dissecting a frog which was female. 2. All of our crew has worn gloves for protection from the chemical that the frog was in, and for our own protection of cutting ourselves. 3.
The purpose of this experiment is to test the hypothesis of pen’s ink affect on termite navigation. If this hypothesis is true, termites will follow a pen ink line only, regardless of the color of the pen’s ink. Method On January 13, 2014 three worker termites were taken out of the nest at the Coastal Carolina Community College Biology section and put into a petri dish with a damp paper towel. The initial observation (a termite following a red circle made of ink) was replicated again for a closer look. After obtaining 5 sheets of white computer paper (21.5cm by 28cm), Test 1 was performed.
4.07: Virtual Frog Dissection Pre-Lab Questions: A. Click on the website: (you may need to hold the control button and click to open) http://www.mhhe.com/biosci/genbio/virtual_labs/BL_16/BL_16.html B. Click on “Introduction” – a short video introduction will play. Answer the following question. 1. Why do we study the digestive system of the frog? (1 pt) We can get a fairly good idea of how a human digestive system works and looks.
In the center the strips, about 3 cm from one end, place a dot of the marker to be tested. The dots should be about 0.2 cm in diameter and dark enough to be clearly visible. Place about 2 cm of water in each glass. Tape the unmarked end of each strip to the center of a pencil so that the strip hangs down when the pencil is held horizontally. Carefully insert the strips into the glasses, dotted end down.
Hypothesis: Using melting points can help determine the difference in total carbon atoms and branches between two or more compounds. Materials List: 1 Spoon 1 Paper towels 3 Small rubber bands 2 Clean sheets of paper 1 Beaker, 100 mL, glass 1 Burner-fuel 1 Burner-stand 1 Goggles-Safety 1 Magnifier, dual 1 Thermometer-in-cardboard-tube 1 Capillary tubes-3/pack 1 Tetracosane Crystals - 0.2 g in Vial 1 Tetradecanol Crystals - 0.2 g in Vial Procedures: Prior to beginning the lab exercise, read the instructions carefully. Begin by setting up a derivative melting point table to collect the data accumulated during the exercise. This lab uses heated water so be sure to follow safety procedures carefully. While conducting this laboratory experiment, be sure to use minimal amounts of each substance in order to create the habit of using only the amount necessary.
Joel Barlow High School Honors Biology Michael Klein Wassink 11-5-2014 Lab: pH, Buffers & Biological Substances Problem How do organisms survive and function despite metabolic activities that tend to shift pH toward either acidic or basic ends of the scale. Hypothesis I predict that as I add varying amounts of 0.1m HCl and 0.1m NaOH to various biological substances the pH levels of those biological substances will go down with the addition of HCl and up with the addition of NaOH because Acids (HCl) release H+ into substances which makes their pH levels go down, and Bases (NaOH) accept H+ from substances which makes their pH levels go up. Materials • 4 goggles • 4 aprons • 50ml beaker • 1-100ml-grad cylinder • 3-colored pencils • Wide range pH paper • Tap water • Forceps • HCl (0.1M) • NaOH (0.1M) • pH 7 buffer solution • Milk • Potato homogenate • Egg white • Gelatin suspension Procedure 1. Pour 25ml of tap water into the 50ml beaker. 2.
Daphnia Heart Rate LAB INTRODUCTION A Daphnia is a tiny crustacean (related to shrimp) that has a clear outside skeleton (carapace) and jointed legs. Like other arthropods, its heart is on its back. The environment challenges each living thing to respond. It includes the air, the water, heat and light, and the chemicals, which enter our bodies. Because Daphnia are ECTOTHERMS (cold-blooded), their body temperature changes with the surrounding environment.
4. Use the markers to draw a different colored dot on each of the appropriate pencil marks on the paper strip. Allow the ink to dry, and then go back and add more color to each dot. Before you complete the rest of the lab, make a prediction of the pigment components you expect to see from each marker’s ink. 5.
These tests consisted of a wafting test, a solubility test in deionized water, and a pH test. The unknown’s characteristics, discovered through the physical tests, were then compared with known cations: Sodium, Potassium, Calcium, Ammonia, and Magnesium. Flame tests were performed in order to classify the unknown cation. A small amount of the solid unknown ionic compound was placed on a watch glass. A wet swab was used to collect a small sample of the compound.
Obtain 6 clean/dry test tubes and arrange in your test tube rack. Label the test tubes 1,2,3,4,5,&6 6a. Test tube 1: Add 5 drops of Barium nitrate solution. Test 2: Add 3 drops of Sodium chromate solution. Combine test tubes 1 and 2 into one test tube (pour test tube into test tube 1).