Posted in P1 SBI3C Biology

SBI3C Homework

Use pages 52-60 to identify the function of the following organelles. Also, know which ones are in plant cells but not in animal cells.

cell membrane
cell wall
Golgi body
nuclear membrane
rough endoplasmic reticulum
smooth endoplasmic reticulum
Posted in P1 SBI3C Biology

SBI3C Scientific Drawing

The point of scientific drawing is generating an accurate and precise 2D model of what you are observing under the microscope. It is a visual observation of your data. Therefore drawing from memory is not as accurate nor precise as drawing bit by bit from the image under the scope or from a photo you took looking through the ocular lens.  You are to draw what you actually see, not what you think you remember.

Rules For Scientific Drawing:

  1. Draw the circle which represents the field of view in the upper left part of your page. Your page must be an unlined sheet of paper.
  2. Only use pencil for everything.
  3. Label only structures you can confidently identify.
  4. Put the title of the specimen centered and underlined above the FOV circle.
  5. Put the magnification in brackets in the bottom-right just outside of the field of view.
  6. Labels must be vertically aligned to the right of the drawing.
  7. Label lines are to be totally horizontal but in some cases a vertical drop-down or extend-up line may be used. These are to be avoided where possible.
  8. Borders between structures are the most important and are to be drawn with clean, solid lines.
  9. Stippling is to be used when shading in areas that are darker (just tap it in!). No shading or cross-hatching is allowed.

Here is an example of how not to (picture on the left), and how to (picture on the right) do a proper scientific drawing: