# Micro-Organisms

10SCIE - Ecology

2020

## Akoranga 7 Mahi Tuatahi

1. Get our your laptop or phone
2. Get open www.kahoot.it

https://create.kahoot.it/details/food-web-food-chain/0b1082af-894b-4b54-9893-bd56ff55d9c4

## Te Whāinga Ako

1. Describe the structure of bacteria and Fungi, labelling the important structures

Write the date and te whāinga ako in your book

## Micro-Organisms

• Micro-organisms/microbes are too small to see with the naked eye
• They are either unicellular (made of one cell), or a small group of cells
• Two main categories: bacteria and fungi

### Bacteria

• Single celled organism (unicellular)
• Typically a few micrometers in size ($$0.000001m$$)
• Come in many different shapes (e.g. spirals, rods, spheres)

#### Structure of Bacteria

• Stick in your unlabelled bacteria diagram
• Label these structures!
• Vacuole
• Nucleus
• Cell membrane
• Cytoplasm
• Mitochondria
• Lipid globules

### Fungi (Decomposers)

• Made of clusters of cells
• Fungi are sometimes too small to see, but once the group of cells gets too large it becomes visible to the naked eye
• Get their food by absorbing dissolved organic molecules

## Function of Fungi

• Fungi exist in ecosystems to break down dead organic matter into small molecules that are able to be be used by other living things
• This is so that energy and nutrients can be reused!

#### Structure of Fungi

• Mycelium
• Spore
• Reproductive Structure
• Hyphae

## Tūhura: Fungi

1. In desk pairs, collect a bag, slice of bread and permanent marker
2. Write your names on the bag
3. Write the date (12/02/2021)
4. Choose a place/thing to wipe the bread on - put this label on your bread
• Everyone should do somewhere different
5. Expose the bread to your surface, seal the bag and pin it to the board!

## Tākaro/Game

Open https://joinmyquiz.com and get ready to play!

## Akoranga 8 Mahi Tuatahi

1. Collect a whiteboard from the front of the room
2. In pairs, try your best to draw and label a diagram of a fungi from memory
3. Extra: Explain the function/role of fungi in ecosystems

## Ngā Whāinga Ako

1. Describe how fungi feed by extra-cellular digestion
2. Describe the role and importance of decomposers in an ecosystem

Write the date and ngā whāinga ako in your book

### Why are Decomposers Important?

They allow energy and nutrients to be recycled through an ecosystem.

### Extracellular Digestion

• Cell membrane: a semi-permeable membrane
• What does semi-permeable mean?
• Only some things (semi) can go through it (permeable)!
• Extra (outside), cellular (cell), digestion (break down)
• Most food is made of large carbohydrate molecules
• It is hard to absorb such large molecules through the membrane, so extracellular digestion is needed to break the carbohydrates into smaller sugars
• Humans, bacteria, fungi and other organisms all use/creat enzymes to break down molecules in extracellular digestion.
• Enzymes are molecular machines that can perform specific functions in biology e.g break some molecules down (or join them together)!