2.2 Bacteria

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

What did we discuss last lesson?

TRUE OR FALSE? Two organisms that belong to the same family, always belong to the same kingdom.

1. True
2. False

TRUE OR FALSE? Two organisms that belong to the same class, always belong to the same species.

1. True
2. False

Drag the words in the correct order from largest (TOP) to smallest (BOTTOM) 

Kingdom

Class

Family

Order

Species

Genus

Phylum

What do you know / think about when
you hear the word 'bacteria'?

What are bacteria?

- unicellular organisms

-reproduction through cell division

- consist of cell wall and cell membrane (but do have a tiny piece of circular DNA in the cytoplasm)

-live everywhere

-obtain food from other organisms

Which shapes do bacteria have?

• Turn the Petri dish upside-down and divide the bottom into quarters, by drawing a cross with a marker pen.
  
• Number the corners of each section 1 to 4.
  
• Without damaging the agar surface, gently press your finger onto section number 1 of the agar.
  
• After washing your finger and drying it, gently press the same finger onto section number 2 of the agar.
  
• Gently press a small object onto section number 3 and remove it. Use cotton swabs if needed.
  
• Gently press a second small object onto section number 4 and remove it.
  
• Replace the cover of the Petri dish, tape it closed and let your teacher put them in an incubator for several days. Compare the dishes by counting the number of colonies in the different sections.
  
• Do not open the dish!

TODAY. 

Work on the learning goals for 2.2. 

You can use the table from AKU!