KS3+Microorganisms

State that some living organisms are unicellular (amoeba, bacteria) Amoeba is a one-celled organism with pseudopods in the Kingdom of Protista. [|Amoeba] from enchantedlearning.com Bacteria is a single celled organism in the Kingdom of Monera. [|Bacteria] from microbeworld.org =**//Activity Stentor//**= //You are made of many cells, but some living things are made of only one. The cell has to do all of the tasks that are carried out by your organs.// //Find out how the single-cell organisms have been adapted to carry out different jobs.//

A single-celled organism called a Stentor lives in ponds and feeds on much smaller plants. It is pulling plant cells (dark dots in a video) into its mouth by making a water current. The current is made by a circle of hairs. The images below are magnified to make them larger than usual.
 * [[image:sciencelanguagegallery/Stentor.png width="172" height="223"]] || [[image:Stentor muelleri.png width="263" height="174"]]

[|Video image] from wikipedia || [|Stentor] from microbewiki.kenyon.edu


 * Activity: Produce a single page showing your labelled diagram and photograph that explains how the cell feeds.**

Obtaining evidence 1 Watch a video sequence showing a single-celled animal feeding. 2 Discuss in groups what is being eaten, and how it is eaten. 3 Draw a large diagram to show how the animal feeds. Label the parts of the cell that are being used. 4 Add descriptions to your labels to explain the ideas you had in your group about what happens. 5 Capture a still image from the video and add it to your work. Label as many parts of the cell as possible.

Considering the evidence 6 How is the cell adapted to help it feed? 7 How could the same adaptation be useful to different cells inside you?

Evaluating 8 What difficulties are there in seeing how cells are adapted?