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LAB 19 FUNGI and Lab 23 Invertebrates &undefinedundefinedVertebrates;>> Get This Solution




Question;LAB 19 FUNGI Experiment 1: Growing and;Observing Zygomycota (Bread Mold);Bread mold will generally ruin a day;when you are looking forward to a sandwich, but will make it much easier to;observe a live fungus. In this lab you will be cultivating the common bread;mold. Any type of bread can be used, but fresh bakery bread will likely grow;more colorful species since it does not contain the preservatives that many;processed varieties do.;Materials;Permanent Marker;Spray Bottle Lid and Empty Bottle;2 Resealable BagsRhizopusDigital Slide Images;*2 Pieces of White Bread;*Water;* You Must Provide;Procedure;Use the permanent marker to label each of the two resealable bags as;?Wet? or ?Dry?.;Take one slice of bread and, spray it with water until moist. Avoid;soaking the bread.;Place the moistened bread in the resealable bag labeled ?Wet? and;seal.;Then, place the second piece of bread in the resealable bag labeled;?Dry? and seal.;Create a hypothesis regarding how the water will affect the bread;over time. Be sure to address which piece of bread you think will host;more growth, and why. Include your hypothesis in Post-Lab Question 1.;Incubate the bags for 3 - 7 days (depending on how fresh the bread;is) in a dark, warm spot.;Examine the bread once mold starts growing.;Examine the digital slide pictures of Rhizopus(Figure 10) and;identify the structures.;Figure 10:Rhizopus digital slide pictures, 100X (above left);400X (above right).;Figure 10 (continued):1000X;Post-Lab Questions;Include your hypothesis from Step 5 here.;What structures did you see in the bread mold?;Why was it important to moisten the bread before sealing it in the;resealable bag?;What type of control;(positive or negative) did the dry bread provide? Explain why.;Is the bread mold;reproducing sexually or asexually? How could you determine this?;What would you expect to find if you left the bread for six months?;Were multi-nucleated hyphae;prevalent when looking at theRhizopusslide? How;do you know?;Experiment 2: Observing Ascomycota;(Yeast);Yeast is a commercially important;member of the Fungi Kingdom. It leavens bread and produces beer and wine. Yeast;is unique because it is unicellular and reproduces by mitosis and budding.;Materials;Yeast;Digital Slide Images;PezizaDigital Slide Images;Procedure;View the digital slide image of yeast (Figure 11). Locate the budding;cells and label what you see in the space below. Using the slide as a;reference, draw a budding yeast cell and include important structures;(ascus, ascospore) on your picture.;View the digital slide image of Peziza(Figure 12). Identify;the asocarp, asci, ascospores, and sterile hyphae.;Figure 11:Yeast 1000X, field 1 (left) and field 2;(right);Figure 12:Digital slide images of Peziza, 100X;(above left), 400X (above right), 1000X (below);Post-Lab Questions;Compare yeast to thePezizaslide. Identify;at least one difference, and one similarity.;How many ascospores are in each ascus of the yeast?;Are the ascospores of thePezizainside or;outside of the asci?;**********************************************************************Lab 23 Invertebrates and VertebratesExperiment 1: Symmetry in;Common Objects;Symmetry can be seen in everyday;objects similar to that of the symmetry seen in organisms.;Materials;Images of Common Lab Equipment;Procedure;Review the objects listed below (many of these can also be found in your;lab kit).;Indicate the type of symmetry each item displays next to the image in;the Post-Lab Questions section.Hint: It is helpful to draw lines of symmetry over the objects and;observe objects from different angles.;For each item, explain why you chose the type of symmetry you did.;Post-Lab Questions;Identify the type of symmetry displayed for each item. Then, indicate;how you came to your conclusion;Petri Dish;Funnel;Test Tube Rack;Wash Bottle with Curved Straw;Graduated Cylinder;Tongs


Paper#62554 | Written in 18-Jul-2015

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