Which one of the following is an example of a plant defence against a pathogen? - production of antibodies - an active immune system - extensive cell death throughout the plant - waxy leaf surfaces acting as physical barriers - VCE - SSCE Biology - Question 17 - 2015 - Paper 1

The example of a plant defence against a pathogen is when plants have waxy leaf surfaces acting as physical barriers. These waxy layers prevent the entry of pathogens, such as bacteria and fungi, thereby helping to protect the plant from infection. In contrast, production of antibodies and an active immune system are responses typically associated with animals, and extensive cell death, although a defence mechanism, is more of a response to an infection rather than a proactive defense.