Unit 8 (Plants) Review
1. Draw, Label, AND Give Function for the following organelles of a plant cell:
CELL WALL
CHLOROPLAST
NUCLEUS
CYTOPLASM
VACUOLE
2. Explain what happens to the radiant energy during photosynthesis.
3. What are two other names for light energy?
4. Identify the location that photosynthesis occurs at inside a plant. (Be specific)
5. Where in the leaf is radiant energy transformed into chemical energy? (Be specific)
6. Draw a diagram of GRASS, SUN, HUMAN, and a COW and identify where light is
converted into chemical energy.
7. Draw a diagram illustrating radiant energy being transformed into chemical during
photosynthesis.
8. What is the role of chlorophyll in plants?
9. Jan eats a power bar for the chemical energy that is stored in it. What is the chemical
energy converted into when Jan works out?
10. Which leaf will produce more glucose? Explain.
11. Illustrate the emergence of a seedling and describe the force responsible.
12.Illustrate and describe three trophic responses of plants.
13.T/F - A plant that is wilting has more turgor pressure than a plant that is standing
upright. Explain.
14.Illustrate two pictures: one for the vacuole of a wilting plant and one for the vacuole of
a healthy plant.
15.How does a plant survive long periods of darkness or seasons without leaves?
16.Explain why the plant is leaning towards the window.
17. Describe the function of the structures below:
Xylem –
Phloem Stomata –
Chloroplast -
18. What internal stimulus causes a plant to wilt?
Plant Review Key
1. Cell Wall – Support and Protection
Chloroplast – Organelle in plant cell; site of photosynthesis
Nucleus – Control center of cell; contains genetic information
Cytoplasm – Gel like liquid inside cell; suspends organelles
Vacuole – Organelle that stores food, water, and waste; larger in plant cells
2.
3.
4.
5.
6.
transformed into chemical energy (food/glucose/sugar)
Radiant or solar
Leaves primarily
chloroplasts
The grass converts light to chemical energy (glucose).
7. Diagram should show radiant/light energy being transformed into chemical energy.
Reactants: Water (H2O), Carbon Dioxide (CO2), sunlight
Products: Glucose/Sugar (C6H1206), Oxygen (O2)
8. To absorb light energy for photosynthesis
9. Chemical  Mechanical and/or thermal
10.The larger leaf; more cells = more chloroplasts = more chlorophyll
11.The emergence of a seedling is when the seed sprouts and emerges from beneath the ground.
This is caused by the cells filling with water and increasing the turgor pressure forcing the
plant to emerge from the ground and stand upright.
12. Hydrotropism = plant’s response to water, phototropism = plant’s response to light,
geo/gravitropism = plant’s response to gravity; growing toward a stimulus is a positive
tropism/ growing away from a stimulus is a negative tropism
13. False – a wilting plant has less turgor pressure
14. Large vacuole in a healthy plant and a small/empty vacuole in a wilting plant
15. Used stored glucose in roots
16. The shoot of the plant is responding positively to light – positive phototropism; Auxin is a
plant hormone responsible for this response
17. Xylem – vascular tissue for transporting water
Phloem – vascular tissue for transporting food
Stomata – pores in leaves that exchange carbon dioxide and oxygen; release water
Chloroplast – organelle found in leaf cells; site of photosynthesis
18. Insufficient turgor pressure; lack of water in cells; flaccid