5. The picture below shows a flower experiencing phototropism, a type of growth movement.

Which of the following best explains the external stimulus that is causing the response in the picture?
The plant, stimulated by light through the window, is responding by growing toward that light.

The plant, stimulated by a need for water, is responding by its roots pushing out of the soil to search for water.

The plant, stimulated by a need for growth, is responding by trying to leave its pot because of lack of space.

The plant, stimulated by indoor air, is responding by growing toward the preferred outdoor air.

How can an organ, such as the lungs, work for multiple body systems?

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.