Microorganisms I
Living organisms too small to be seen with the naked eye.
Microorganisms
Most microorganisms are made of just one of these.
a single cell
Yeast produces this gas that makes bread rise.
Carbon dioxide
Spread of disease by coughing, sneezing, or talking.
Droplet infection
Organisms that break down dead plants and animals.
Decomposers
Bacteria turn milk into this food by producing lactic acid.
Yoghurt
Medicines that kill bacteria or stop them growing.
Antibiotics
Cooking bread has this effect on yeast cells.
killing the yeast
Disease spread by touching infected people or surfaces.
Direct contact
Two main groups of decomposers that are microorganisms.
Bacteria and fungi
This type of microorganism has no nucleus.
bacteria/ virus
A hormone made by genetically modified bacteria to treat diabetes.
Insulin
This acid gives yoghurt its sharp taste.
Lactic acid
Eating undercooked food can spread disease this way.
Contaminated food and drink
A model showing who eats whom in an ecosystem.
A food chain
This microorganism is much smaller than bacteria and needs a host to reproduce.
a virus
The scientist who discovered penicillin.
Alexander Fleming
The solid part of milk used to make cheese.
Curds
COVID-19 is caused by this type of microorganism.
Virus
The first organism in most food chains.
A producer
A single-celled fungus used in baking and brewing.
Yeast
The theory that diseases are caused by microorganisms.
The germ theory of disease
The liquid left over when cheese is made.
Whey
Keeping distance between people helps reduce this.
Spread of infection
A more realistic model linking many food chains together.
A food web