Cells and Microscope

Learning Goals

2

D 2 We are learning to investigate the principles of scientific classification

Success Criteria: I can…

- draw biological diagrams of representative organisms from each of the kingdoms

- classify collected organisms using proper taxonomy - use appropriate material & equipment safely, accurately, & effectively

3

Prokaryotic VS Eukaryotic

• What differences do you notice about the two cell types?

Prokaryotic VS Eukaryotic

• What differences do you notice about the two cell types?

Prokaryotic VS Eukaryotic

• What differences do you notice about the two cell types?

Prokaryotic VS EukaryoticProkaryotic Cell :

- Small and simple - Single circular strand of DNA

Eukaryotic Cells :- Organelles- DNA in a double membrane nucleus

Prokaryotic Vs. Eukaryotic

Prokaryotic Cellseg: Bacteria

Prokaryotic Vs. EukaryoticEukaryotic Cells (having true nucleus)

eg: Animal cells- Amoeba - Cheek

Prokaryotic Vs. EukaryoticEukaryotic Cells (having true nucleus)

e.g.. Plant cells- Onion skin

Prokaryotes Eukaryotes

Cell Organization

Nucleus

Components

Types

Size

A. Prokaryote? Eukaryote?

1. Prokaryote? Eukaryote? 2. What is it that tells you it’s a prokaryote? 3. What is the arrow pointing to?

12

B. Prokaryote? Eukaryote?

1. Prokaryote? Eukaryote? 2. What is it that tells you it’s a prokaryote or eukaryote?

13

14

C. Prokaryote? Eukaryote?

Work samples

20

Open to your homework1. Safety Sheet (hand in)2. Your NOTE with completed flow chart/numbered

steps of how to make a wet mount. 3. Answers to the questions regarding

prokaryote & eukaryote & membrane-bound organelles.

21

Using the Microscope ? Low rule (light, stage, power)? Magnification

22

Illustration Rules» Always use a pencil.» Always print.» Draw a circle to represent the microscope’s field of

view.» Label off to one side.» Use a RULER when labelling.» Add a title and state the observed magnification.» Draw cells at the BEST magnification (that which

shows the required detail).» With tissues or groups of cells, Illustrate only 3-5 cells

to get the gist.

23

» Everyone will need a white board…» Draw & label the following image.

Onion Cells

NOTE: The ocular magnification is 10X and the objective is 10X.

1

Measuring SizeMagnification 10 x 10 = 100x

1. Go to 100x magnification- (10 eye piece x 10 objective) 2. Use the scale of diameter = 1000 um 3. Estimate size

Onion Cells (100X)

Estimate the size of an onion cell.

Cheek Cells (100X)

Estimate the size of a cheek cell.

Paramecium Cells (100X)

Estimate the size of a Paramecium.

Elodea Cells (200X)

Estimate the size of a one Elodea cell.

30

Open to your homework1. Your NOTE with completed flow chart/numbered

steps of how to make a wet mount.