Lab 2 Writing Assignment Due: Thu Apr 18, 2024 11:59pm Attempt 1 In Progress NEXT UP: Submit Assignment 10 Points Possible Add Commen Unlimited Attempts Allowed ✓ Details Please refer to this Google document describing the Lab 2 "Lab Writing Assignment #1" for instructions. Once finished with your assignment, submit it here to Canvas as a Word document or pdf that includes 1) Your captioned image (= figure (image) + caption) 2) Your compare and contrast (table & paragraph) 3) Your scored grading rubric table Please ask if you have any questions! ✓ View Rubric Ⓡ Σ B hp 31 Submit Assignment Ne Apr 18 2:44/n/n ** This document is being shared as a viewable document only because this document is being used by everyone taking Biology 211 this quarter. Should you wish to answer questions or take notes about this lab, please copy and paste this document into another file and annotate the document there. ** BIOL& 211 | Lab 2 | Compound Microscope and Cellular Diversity Credit: CCO Public Domain Part 1: Concepts of Microscopy Objectives • Learn how to use microscope “field of view” dimensions to estimate the size of objects viewed with the microscope. Understand some essential microscope terminology, including compound (or light) microscope, field of view, depth of field, magnification, contrast, and resolution. INTRODUCTION Humans are visual creatures, obtaining much of our information about the world around us by using our eyes. Not surprisingly, some of the most useful tools in biology are those that allow us to visualize objects, processes, and phenomena. Powerful computers and other recent technologies today allow us to visualize and explore as never before. But even these cannot replace one of the most fundamental tools of biology, the microscope. With the microscope we can see things that are too small for the naked eye. There are many different kinds of microscopes (see your textbook). The one you will familiarize yourself with today is the compound light microscope. In this online lab activity we will explore how to use and care for this most basic of biological tools that has unlocked so many mysteries of the biological world! PRELAB As preparation for the lab: 1. Watch this video on how to use a microscope: https://www.youtube.com/watch?v=xzjowD1KN20 2. Familiarize yourself with the following terms in microscopy: Field of view: Refers to the area you see when you look through the microscope. As you observe a specimen using the three different objective lenses, note how the field of view changes with magnification. • Depth of field: Refers to the vertical distance (thickness or depth) that is in focus at • the same time. The depth of field also changes with magnification. Magnification: The apparent increase in size • Contrast: Refers to the degree of difference between dark and light areas of the • specimen. High contrast is helpful in bringing out details. Resolution: The ability to see two closely spaced objects as separate ** As you go through the cell size estimation activity in the next couple of pages, think about how the above terms are important in generating the images that you see. 1 Activity: Cell Size Estimation In this activity, you'll learn how to use scale bars to calculate the size of specimens visualized with a compound microscope. To start, please watch the following video: https://www.youtube.com/watch?v=E_NiyAt7pRM 1. Determining the size of a red blood cell Observe the image of red blood cells. 50μm Notice that the scale bar says "50µm,” which is 50 micrometers or 0.05 mm. First, estimate how many blood cells could fit end to end along the scale bar. Now, use that estimate and the equation below to calculate the size of an individual blood cell: 0.05 mm (length of scale bar) Number of cells that fit along scale bar Your calculations: 2 _mm (diameter of 1 cell) 2. Determining the size of a Volvox colony Observe the image of Volvox globator. 150μm Notice that the scale bar says “150 µm,” which is 150 micrometers or 0.15 mm. Estimate how many of the Volvox can fit along the scale bar. Does one entire Volvox fit, or does only part of one fit on the scale bar? Show your work below. Your calculations (include the correct equation for this problem, as modeled in the first problem): 3 3. Determining the diameter of a sea urchin sperm Observe the image of sea urchin sperm. 50μm Notice that the scale bar is 50 μm. Determine the diameter of the head (round portion) of a sea urchin sperm. Your calculations: 4/n INSTRUCTIONS FILE Here you have to make the both lab report as they are dependent In case you have to choose anything you will 1 choose all bacteria and everything required by yourselves

A vehicle towing a trailer through a spring-damper coupling hitch is shown in Fig. 2P-7. The following parameters and variables are defined: M is the mass of the trailer; Kh, the spring constant of the hitch; Bh, the viscous-damping coefficient of the hitch; B₁, the viscous-friction coefficient of the trailer; y₁(t), the displacement of the towing vehicle; y2(t),the displacement of the trailer; and f(t), the force of the towing vehicle. Write the differential equation of the system.

Question 4. How do organic compounds differ? Select all that apply. O length branching O multiple bond variation O ring structure O presence of functional groups

Write the torque equations of the gear-train system shown in Fig. 2P-14. The moments of inertia of gears are lumped as J₁, J2, and J3. Tm(t) is the applied torque; N₁, N2, N3, and N4 are the number of gear teeth. Assume rigid shafts. a. Assume that J₁, J2, and J3 are negligible. Write the torque equations of the system. Find the total inertia the motor sees. b. Repeat part (a) with the moments of inertia J₁, J2, and J3.

submit a photo of anything (natural, engineered, crafted, designed) that resembles an Microbiology structure (this includes histology, tissue organization, and micro-structures such as protein fibers/arrangements). Therefore, images may be of flowers, trees, the night sky, clouds, bridges, buildings, abstract art (2D/3D), rivers, oceans, ponds, pools, fruits, vegetables, etc... You will arrange the three images into a word document you create; one image is a photo of the Microbiology structure, the second photo is an annotated version of the photo outlining the Microbiology structure you identified, the third picture is a reference image (of actual Microbiology structures) to support submission.

Buffers should have which of the following characteristics? Select all that apply. They should be able to accept excess hydrogen ions They should be able to release excess hydrogen ions They should be able to accept hydroxide ions They should be able to release hydroxide ions

shows the diagram of a print wheel system with belts and pulleys. The belts are modeled as linear springs with spring constants K₁ and K₂. Write the differential equations of the system using Om and y as the dependent variables.

You are provided with three species of bacteria, Escherichia coli, Staphylococcus epidermidis and Bacillus megaterium, labelled A, B and C. You are required to identify A, B and C, given that: 1. Escherichia coli: This is a Gram negative, rod-shaped bacterium, which produces beige colonies when grown on nutrient agar. 2. Staphylococcus epidermidis: This Gram-positive coccus produces white, raised colonies on nutrient agar. 3. Bacillus megaterium: This Gram-positive rod-shaped bacterium that gives rise to beige colonies when cultured on nutrient agar. 4. What techniques could be conducted to help confirm the species of isolated bacteria?

Each student must post one (1) substantial initial post as a response to the discussion question with a minimum of 150 words by Wednesday at 11:59 PM. Review the module resources and read the scenario to answer the discussion questions. It is the Year 2056 and the first manned crew to land on Mars returned home after a 15-month round trip including 4 weeks living on Mars. Among their discoveries was a novel bacterium that showed potential in consuming all kinds of plastic which could help eliminate the harmful impact plastic disposal has on Earth's ecosystem. After careful testing and engineering, the bacterium was viewed as a viable and cost-efficient means of plastic pollution control and fully utilized by the waste disposal industry. Fifty years later, an epidemic ravaged the world in which a variant of this bacterium was discovered to be the cause. Most common symptoms included dysentery, fever, and general malaise; however, twenty percent of the general population developed severe rhabdomyolysis, a life-threatening condition that breaks down muscle. You are part of a group of representatives from the CDC fielding questions in a special Congressional hearing. One Senator looks at you and asks, "How can a plastic-eating bacteria turn into a muscle-eating bacteria? Why are only humans being affected?" Answer the Senator's questions. How can a plastic-eating bacteria turn into a muscle-eating bacteria? Why are only humans being affected? Use your imagination to develop a plausible scenario using the microbial genetics you have learned this week. Make sure you can explain and justify your reasoning.

‘Understanding the mechanisms of bacterial adhesion will unlock many new therapeutic options.’. Critically discuss this statement in the light of the current interest in anti-virulence therapies

Understanding the epidemiology of infectious disease requires a significant commitment to data collection and dissemination. A. Describe in detail the diverse types of data required to diagnose disease at a population level B. Discuss how this data can be collated and disseminated C. Comment upon the changing nature of infections and consider the reasons for the appearance of some specific novel pathogens within the last 25 years