• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Biology lab. Observing plant and animal cells using the light microscope

Extracts from this document...

Introduction

IB BIOLOGY LABAROTORY WORK DARIA SOVA 2011 Observing plant and animal cells using the light microscope Materials: A red onion, potato, distilled water, iodine solution, methylene blue, dropping pipette, fine forcps, scalpel, microscope, slides, cover slips, tooth picks. Method: A-Red onion epidermal cell: 1.Cut the onion in four, using a scalpel, from the top to the base. Take one of the fleshy scales using the scalpel cut a square (5mm by 5mm) on the outer, convex surface, which is dark red. 2. Using fine forceps peel of the surface of one of the colored epidermal squares. Place the fragment, with the torn surface facing down, onto a slide. Add a drop of distilled water and a cover slip. 3. Under high power, carefully adjusting the diaphragm, draw a colored cell from each preparation. Add a title and label. In the microscope we can see that the onion cells have a rounded oblong shape. They zone tightly to each other. ...read more.

Middle

Mount the scrapings in a drop of iodine water on a slide. Allow the fragment of potato to soak in the iodine solution. Then place a cover slip over it. 3. Observe the preparation under the microscope. Adjust the diaphragm carefully so that the outline of the cells can be clearly seen. Draw a cell at high power and label it. Compare this slide with the banana slide. The potato tuber consists mainly of a mass of cells filled with starch and encircled by a thin corky rind. A woody fibers traverse the tubers. The cells of potato have cell wall, which supports the form of the cell, and nucleus with genetic information. There we can see much more fibers and starch. The form of the cells of potato is acute-angled. Starch in the tubers is rendered available for the nutrition of the young shoots. Banana cells are round and potato cells are acute-angled. In the potato cells there more starch than in the banana cells, the fibers are more dense, and the cells more zone tightly to each other. ...read more.

Conclusion

5. Draw what you see on your answer document. 6. Write 5 qualitative and quantitative observations about the cells you observed. Elodea is a genus of aquatic plants often called the waterweeds. Cells have cell wall, nucleus, cytoplasm and many chloroplasts inside of the cell near the cell wall. cells have a oblong shape. They zone tightly to each other. G- Daphnia Daphnia is a genus of small, aquatic, mostly freshwater crustaceans characterized by a single compound eye, two doubly branched antennae, and a generally translucent carapace. Daphnia are commonly called water fleas because of their jerky or jumping swimming style (although fleas are insects and thus these two groups are only very distantly related as being arthropods). H- Amoeba Amoeba is an unicellular organism. In the microscope we can see that It consist of the endoplasm, ectoplasm, cellwall, nucleus. Also it has pseudopodia. I- Oligochaeta Oligochaetes - a subclass of annelid worms of the class of Clitellata. Body length from a fraction of mm to 2,5 m. Segmentation of the body is well expressed in the inside and outside. Head, parapodii absent. Each segment of the body contains several pairs of setae. Consists of segments ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Marked by a teacher

    Osmosis Internal Assessment (Biology)

    4 star(s)

    23.33% 23.33% 20.00% 5.0 20.00% 20.00% 20.00% 23.33% 20.00% 20.00% Graph 2. Mean percent change in mass of potato strips immersed in distilled water viii. Calculations Involved Eg. Eg. Eg. Eg. Eg. ix. Conclusion As seen in graph 1, as the duration of the immersion of potato strips in the solution increased, the mass of the potato strips generally increased.

  2. Marked by a teacher

    IB BIOLOGY INTERNAL POTATO OSMOSIS

    3 star(s)

    There were inaccuracies in removing the potato chips from the solutes. The removal was simply done by human draining, which could have left more solutes in certain chips and less in others.

  1. Biology - Observing the Process of Guttation

    experience a high soil moisture level where water would accumulate and create a slight root pressure so that water will exude from the hydathodes (a type of tissue in the leaves). Prediction: I predict that the green bean sprouts grown in the enclosed containers will experience higher humidity and a

  2. Environmental Factors affecting plant growth

    It could also induce potassium deficiency which could also be problem for the plant. An observation made during the experiment was the rate of plant growth. The plants grew very slowly. Maybe this was due to the type of seed or due to the deficiency of phosphorus but as I

  1. IB Genetic Unit Notes

    and DNA ligase. Gene transfer involves * A vector * Host cell * Restriction enzymes * DNA ligase 1) The plasmid is removed from the bacterium and the T-DNA is cut by a restriction enzyme 2) Foreign DNA is cut by the same enzyme 3)

  2. Experiment Colours of Light (Wavelength) absorbed by green plant

    0.97 0.84 1.08 520 0.00 0.76 0.64 0.73 550 0.00 0.77 0.50 0.15 580 0.00 1.03 0.76 0.87 590 0.00 1.16 1.19 1.13 680 0.00 1.35 1.44 1.39 Table 4: The table above shows the amount of absorption of wavelength by the spinach sample exposed to different wavelength, referred to standard solution and taken in 3 different trials.

  1. IB Genetic Lab

    and height, collected by surveying them in person Gender Age Length of arm-span (� 0.1cm) Height (� 0.1cm) F 8 134.0 133.6 F 5 109.7 112.1 F 9 132.1 133.0 F 12 145.0 144.5 F 17 172.0 171.2 F 15 161.5 157.0 F 16 184.0 182.3 F 16 170.0 170.1

  2. Lab 2 : Microscopy OBJECTIVES ...

    When the diaphragm is gradually opened the intensity of light increases and the ability to see the image becomes clear once again.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work