Suzie wants to know the effect of different colors of light on the growth of plants. She believes that plants will grow best in white light. She buys 5 ferns of the same species, which are all approximately the same age and height. Then, she places one in white light, one in blue light, one in green light, one in red light and one in natural light. All of the ferns are given 6 hours of light and 20 mL of water daily for 2 weeks.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

plants absorb water from the soil by osmosis. root hair cells are adapted for this by having a large surface area to speed up osmosis. the absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: it transports dissolved minerals around the plant.