I think it would be something like a landslide
General Westmoreland was the chief commanding officer during the Vietnam War. After his tenure Creighton Abrams took over.
The similarities between bones of humans and other animals shows that every living creature on earth has a common ancestor, even if that common ancestor is as simple as a sing-celled organism.
It contracts and is pulled downwards
In order to conduct a research you should have an dependent variable, independent variable and the control variable. so in order to study phototropism, then you should need sun light and the growth of the plant and you must have a control that why you need a dark room.