NEW OCR Biology A 5.5.1 Plant Responses to the Environment

An interactive and fun power point presentation introducing A-level plant responses.

The detailed slides cover plant responses to external stimuli (including chemical responses) and the two main types of response, tropisms and nastic responses.

There are a number of interesting video clip links to bring these responses to life, along with a practice exam question and mark scheme, a research activity on named plant hormones and a matching plenary activity to finish.

5.5.1. (a) (i) to know the types of plant responses
To include the response to abiotic stress and
herbivory e.g. chemical defences (such as tannins,
alkaloids and pheromones), folding in response to
touch (Mimosa pudica)
AND
the range of tropisms in plants.
M1.3, M1.6
HSW4
(b) To know the roles of plant hormones To include the role of hormones in leaf loss in deciduous plants, seed germination and stomatal
closure.