Brassica rapa bio clock (IMAGE) Dartmouth College Caption Duplicate genes in the food crop Brassica rapa are regulated by the plant's biological clock to help adapt to new regions and climate change. Illustration by Kathleen Greenham. Credit Illustration by Kathleen Greenham. Usage Restrictions Must credit: Illustration by Kathleen Greenham License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.