Curriculum

Course: Science — First Preparatory

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Curriculum

Science — First Preparatory

Unit 1: Matter

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Unit 2: Forces

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Unit 3: Life

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Unit 4: Earth and Space

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Text lesson

Microbes

Science — First Preparatory

Microbes

What are microbes? Their main types

What are microbes? Their main types

Microbes are very small organisms that cannot be seen with the naked eye, and are usually seen with a microscope.
They include the following types:

Type	Distinctive structure	Examples
Bacteria	A simple cell with no true nucleus surrounded by a cell wall	The lactic acid bacteria in yoghurt and the tuberculosis bacterium
Fungi	True-nucleus cells some are single-celled and some form threads	Yeast and the green mould that grows on bread
Protozoa	Single-celled organisms with a true nucleus that move using cilia flagella or pseudopodia	The amoeba and Plasmodium that causes malaria
Microscopic algae	Tiny plant-like organisms that carry out photosynthesis	Chlorella
Viruses	Not cells made of genetic material inside a protein coat they reproduce only inside a living cell	The influenza virus, and the coronavirus

Scientists differ on whether viruses are living organisms, because they are not made of cells, do not respire, and do not feed on their own.
However, they carry genetic material and reproduce.

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