Micro-Organisms

10SCIE - Ecology

Finn LeSueur

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

Source
  • 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

Source
  • 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

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

Fungi (Decomposers)

Source
  • 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

Source
  • 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!
Source

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.

Source

Extracellular Digestion

Source
  • 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)

Source
  • 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

Source
  • 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)!

Bread Tūhura/Investigation

  • In humans we do extracellular digestion in our mouths, with the enzymes in our saliva!
  • Take a piece of bread here, mush it up in your mouth but don’t swallow it! Over time your should notice the flavour start to change. What do you observe?

Ngohe/Activity

Open the TedED link on Google Classroom, watch the video and then answer the questions associated with it.