Cell Size and Diffusion Investigation

timer Asked: Feb 6th, 2019
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Question Description

i did a lab and now i have to do a report but dont have time due to the fact i need to study for other exams.

Just write a lab report 2 pages or like one & a half:

Section One: What were you trying to explain and why?

Section Two: How did you go about your work and why?

We added bromothylmol blue agar cubes to vinegar and had a stop watch to see how fast it turned yellow.

Section Three: The Argument

The argument is the shape of the cell, not the surface area to volume ratio that determines the most efficient at diffusing essential nutrients.

The pictures below are my evidence!! please include it!!

I also added and example lab report.

heres an example of our experiment:

Cell Size and Diffusion Investigation
Cell Size and Diffusion Investigation

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Student Number 1234 Investigation: Cell Structure Section One: What were you trying to explain and why? Differences in cells let us distinguish plant cells from an animal cells. The two share some things in common like a membrane, nucleus, and mitochondria. But there are specifics for each type of cell that differentiates them, like the centrioles in animal cells, which help in the process of mitosis and meiosis; and chloroplast in plant cells which basically carries out photosynthesis. Both these types of cells are classified as eukaryotes, meanwhile prokaryotic cells, which include things like bacteria, have different characteristics that make them easy to identify like the flagella. It is important to know how to identify different organisms and their characteristics, so you have a better understanding of what you are looking at. My task is to document the traits of the known and unknown organisms, then classify them based on what you know about the characteristics of plant and animal cells. The guiding question is, “how should the unknown organisms be classified?” Section Two: How did you go about your work and why? The first thing that was done was preparing a slide, made from a human cheek cell. The slide was created by taking a tooth pick and scraping cells off the side of the inside of the cheek. Then we placed that on a slide with a few drops of water. This slide was observed under the microscope and it held all characteristics of an animal cell, the membrane and nucleus were clearly visible. Two samples of the cheek cells were created because one of them was harder to look at and you couldn’t see the parts of the cell. The next slides observed were prepared slides one plant and one animal cell. The prepared animal cell was very similar to the cheek cell; the cell did not have a set shape. Meanwhile the prepared plant cell had more of a rigid structure, the cell wall, the green chloroplast was extremely visible compared to looking at other samples. For the final slide it needed to be made from a sample of pond water. Three drops of the sample were placed on the slide with a cover on top. The slide was then placed under the microscope; it was harder to see any sort of cell structure in this slide than the previous. There were a lot of air bubbles rather than cells. Once a cell was found it was difficult to tell whether it was plant or animal. But there were things that were missing, there was no visible chloroplast or cell wall, which helped the decision on it being an animal cell. The data helped me answer the guiding question because we observed what a plant cell looked like what an animal cell looked like, and what their visible variances were. With this known information I classified the last slide made from the pond water sample as an animal cell. Section Three: The Argument The unknown cell seems to resemble an animal cell. Unlike the plant cell, the unknown did not have a rigid cell wall. And it looked more similar to the animal cell slide samples that had more of an oval shape. Something else that supported the claim is that we had the information that at one point the cell was alive and moving, just not at the time it was observed because it had died. The appearance of the cells was obviously very important in deciding the claim, in the plant cell we saw the dark nucleus and something that had a honeycomb shape. This was so different from the unknown slide, which was added support to the claim. After listening to the other groups explanations and justifications for their claim, ours seemed to resembled all the other groups. ...
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Tutor Answer

School: UC Berkeley

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Investigation: Cell Size and Diffusion
Section One: What were you trying to explain and why?
Diffusion is the movement of particles including ions and organic molecules from an area
which they are more terms of concentration, to an area which their concentration is a low per
molecule. The cells use this method in acquiring nutrients for their own growth. Despite the
growth, cells will always remain small, they are however capable of forming big organs when
accumulated through functional...

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Thanks, good work

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