A virus, bacterium or other microorganism that causes disease.

An insect or other animal that damages plants and can spread plant pathogens.

Waterproof coating on the surface of a leaf.

Structure made of cellulose that surrounds plant cells.

A substance that kills microorganisms or stops their growth.

Plant defences against disease

Biology

Non-specific defences of the human body against pathogens

Responses of the human immune system to specific pathogens

Immunity and vaccination

Evaluating the global use of vaccination

Light microscopy: observing and identifying microorganisms

Pupils will learn about the use of antibiotics against pathogens, and the development of new drugs and novel treatments for disease.

Pupils learned about non-communicable diseases in humans, including cardiovascular diseases and cancer; and about communicable diseases in humans and plant caused by pathogens including bacteria, viruses, fungi and protists.

This unit explores the body's defences and immune response against pathogens, disease prevention, and vaccines. It covers plant defence responses, and disease detection, and evaluates scientific applications, considering personal, social, economic, and environmental implications.

Defences against pathogens, the human immune system and vaccination

Match the disease to the pathogen that causes it.

Which of the following are physical defences?

What substance in the phloem of a plant do some insects feed upon?

Sec_Sci_AW_190_2

Which plants produce poisons that deter herbivores from eating them?

Which plants demonstrate mechanical defences?

The image below shows the cross section of a leaf. What is being shown by label A?

Which organism in this food chain is a herbivore?

Plant defences against disease

Lesson outcome