Journey of Substances-Plants

What is the process by which molecules move from an area of high concentration to an area of low concentration?

• Osmosis

• Active transport

• Diffusion

• Transpiration

In which direction does water move during osmosis?

• From a hypotonic solution to a hypertonic solution

• From a hypertonic solution to a hypotonic solution

• Equally in both directions

• Water doesn’t move during osmosis

In which plant structure does gas exchange primarily occur?

• Roots

• Leaves

• Stems

• Flowers

What is responsible for the movement of water and minerals from the roots to the rest of the plant?

• Diffusion

• Tropism

• Translocation

• Transpiration

In a plant cell placed in a hypertonic solution, what will happen to the cell?

• It will swell and burst

• It will shrink and plasmolyze

• It will remain unchanged

• It will undergo photosynthesis

Which specialized cells in leaves are involved in gas exchange?

• Parenchyma cells

• Xylem cells

• Stomatal cells

• Collenchyma cells

Which of the following represents a well-formulated research question related to plant biology?

• "What is the color of a plant's leaves?"

• "How does the intensity of light affect the rate of photosynthesis in spinach leaves?"

• "Are all plants green?"

• "How tall can a plant grow?"

Which statement is an appropriate hypothesis for an investigation on osmosis?

• "If I water plants with saltwater, they will grow taller."

• "If plant cells are placed in a hypertonic solution, water will move out of the cells, causing them to shrink."

• "Plants need water to survive."

• "All plants will exhibit the same rate of water absorption."

Which method is most appropriate for quantitatively measuring transpiration in plants?

• Counting the number of leaves on a plant

• Weighing a plant before and after a set time period

• Observing the color changes in plant leaves

• Measuring the height of the plant

If the data collected in a gas exchange experiment show an increase in oxygen production with higher light intensity, how would you interpret this result?

• Light intensity has no effect on oxygen production

• There is a positive correlation between light intensity and oxygen production

• Oxygen production decreases with higher light intensity

• Light intensity only affects carbon dioxide levels