BIO 123 Microscopy Lab Report With Answers

MICROSCOPY LAB REPORT WITH ANSWERS 1. Give a description of the part of the microscope named arm • connects the body tube to the ba microscope body tube • connects the eyepiece to the obj co arse focus adjustment • Brings the specimen into genera Iris diaphragm • Adjusts the amount of light that specimen. eye piece/ocular • The lens the viewer looks throu specimen fine focus adjustment • clears the focus and increases th specimen. Objective lenses • the lenses closest to the specime microscope has three, four, or fi that range in power from 4X to Illumination • the light source revolving nose piece • A rotating turret that houses the lenses. Stage • The flat platform where the slid stage clips • Metal attachments that hold the place. • Metal attachments that hold the slide in place. (STAGE CLIPS) • connects the body tube to the base of the microscope (ARM) • the lenses closest to the specimen. A standard microscope has three, four, or five of these that range in power from 4X to 100X. (OBJECTIVE LENS) • Adjusts the amount of light that reaches the specimen. (IRIS DIAPHRAGM) • A rotating turret that houses the objective lenses. (REVOLVING NOSE PIECE) • connects the eyepiece to the objective lenses (BODY TUBE) • The flat platform where the slide is placed. (STAGE) • The lens the viewer looks through to see the specimen • the light source (EYEPIECE/OCULAR) • Brings the specimen into general focus. (COURSE FOCUS ADJUSTMENT) • clears the focus and increases the detail of the specimen. (FINE FOCUS ADJUSTMENT) 2. Calculate the magnification options of the compound microscope Ocular Lens x Objective Lens = Total Magnification Color of the Objective Lens x10 4x 40x red x10 10x 100x yellow x10 40x 400x blue x10 100x 1000x white Feedback Comments Comment: the colors are not correct 3. Describe how the letter e appears under the microscope. Based on what you know about inversion, what do you think the letter e appears like when you are looking at it with the naked eye (i.e. not under the microscope). 4. Zoom in to 400x on the onion root tip. You should be able to see square-like shapes with dark areas in the center. Based on what you have learned about cells and cell structure, what are the dark areas in the middle of each square? Define its function. 5. Because you are looking at a plant cell, there is possibility you could identify other organelles under the microscope as well. List at least 3 organelles you (in theory) could identify in the plant cell that would not be in the animal cell. Include their functions 6. Zoom in to the highest power on the bacterial capsule. How can you tell you are looking at a prokaryote, and not a eukaryote? 8. Describe the cell theory. 9. Describe the differences between prokaryotic and eukaryotic cells. 10. Eukaryotic cells contain many different organelles that constantly keep our bodies working at a normal and healthy state. One particular set we learn about is the endomembrane system which includes 5 different organelles. Describe this system more in detail. Include how it differs between plants and animals. 11. Zoom in to 400X on the human cheek smear. Are you looking at a prokaryotic or eukaryotic cell? Select one: A. Prokaryotic Powered by TCPD