Describe what is meant by photoperiodism

A response controlled by relative light and dark periods. The name of the receptors responsible for absorbing light are phytochromes. The photoperiodic stimulus is detected by the leaves of the plant. 

AO

Related Biology A Level answers

All answers ▸

List the ways in which arteries and veins differ


What are sinusoids?


Why is the genetic code described as being universal?


Explain, in terms of the movement of ions, the shape of a typical action potential.