What is positive phototropism and why does it matter?
IU doctoral graduates make the case for an eastern U.S. origin of the domestication of sunflowers.
Surprisingly, even though there is no light to catch, the sunflower will continue to bend every day just as it did when it was outside. This is a classic example of what scientists call a circadian rhythm — it’s a daily cycle of behavior that is internal to the organism, rather than being solely triggered by the environment.
On this Moment of Science we talk about the complications of genetically modified plants and weeds.