Which of these are examples of negative tropism? (Select all that apply.)
a plant’s roots growing down into the soil due to gravitropism
a plant’s stem growing upward out of the ground due to gravitropism
a plant’s leaves growing toward the direction of the sun due to phototropism
a plant’s roots growing toward a water source due to hydrotropism
a plant’s leaves growing away from the sunlight due to phototropism
a plant’s roots growing away from a water source due to hydrotropism