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Mucous in the trachea traps pathogens Microorganisms in food are killed by stomach acidThe skin forms a physical barrier against pathogens

Diffusion and osmosis both describe the net movement of molecules down a concentration gradient, resulting in an even spread of the molecule over an area over time. Osmosis, however, is more specific as i...

There are two different types of microorganism - bacteria and viruses. The human body is covered in bacteria, the majority of which is good bacteria and they won't cause any harm. The rest are pathogens w...

Taken from AQA specification learning outcome 4.1.1.2Students should be able to explain how the main sub-cellular structures, including the nucleus, cell membranes, mitochondria, chloroplasts in plant cel...

No prokaryote cells like bacteria contain their genetic material in a nucleiod in the cytoplasm.