1. In an investigation, students performed the following steps and made some observations: (1) The students poured fresh water into a beaker and added a few drops of a chemical solution called bromthymol blue. The water in the beaker turned blue. (2) One student blew through a straw into the water in the beaker. The water in the beaker turned yellow. (3) The students then placed some waterweed (a plant) into the water in the beaker and placed the beaker under a bright light. (4) After a short period of time, the students observed the beaker. The water had turned blue again and there were bubbles on the waterweed leaves.

2. The water changed from blue to yellow when the student blew into it (step 2). Identify the compound that caused the water to change from blue to yellow.
Explain why the water turned blue again when the beaker with the waterweed was under the bright light (step 4). In your explanation, identify the process that caused this change.
Explain why there were bubbles on the waterweed leaves (step 4).
Write the complete equation for the process that caused the changes in step 4. You may use words or symbols in your equation.

3. 5. Which of the following statements describes a difference between photosynthesis and cellular respiration in plants?
A. Photosynthesis occurs only during the day, whereas cellular respiration occurs only at night. B. Photosynthesis involves only one reaction, whereas cellular respiration involves many steps. C. Photosynthesis occurs only in cells containing chlorophyll, but cellular respiration occurs in all cells. D. Photosynthesis converts light energy into chemical energy, but cellular respiration converts light energy into heat energy.

4. 6. During the processes of respiration and photosynthesis in plant cells, what are the three primary elements that cycle between the mitochondria and chloroplasts?
 A. carbon, iron, and sulfur
 B. hydrogen, carbon, and oxygen
 C. carbon, nitrogen, and phosphorus
 D. hydrogen, oxygen, and potassium

5. 7. The amount of water a plant has in its tissues is determined primarily by the balance of which of the following processes?
 A. runoff and root absorption
 B. respiration and photosynthesis
 C. precipitation and photosynthesis
 D. root absorption and transpiration

6. 8. In periods of hot, dry weather, the pores on the leaf surfaces of most plants close in order to reduce water loss during the day. When these pores are closed, plants cannot take in carbon dioxide. As a direct result, the rate of which of the following processes decreases?
 A. cellular respiration
 B. mitosis
 C. nitrogen fixation
 D. photosynthesis

7. 9. Plants absorb solar energy during photosynthesis
9. Plants absorb solar energy during photosynthesis. The graph below represents how this energy is distributed in some plants. Which of the following statements describes what happens to the energy represented by the section labeled X?
 A. It is recycled to the Sun.
 B. It is consumed by decomposers.
 C. It is lost to the soil and the atmosphere.
 D. It is used for cellular respiration and maintenance

8. 10. Mallory has four aquatic plants of the same size and species
10. Mallory has four aquatic plants of the same size and species. She submerges each plant in a separate beaker filled with 200 mL of water. She then sets each beaker under a different intensity of light. Mallory observes that, of the four plants, the plant in the beaker under the most intense light gives off the most gas bubbles in a 20 min period. Explain Mallory’s findings.

9. 11. What will most likely be the result if all of the mitochondria are removed from a plant cell?
A It will be unable to carry out respiration.
B It will lose water through osmosis.
C It will break down the ribosomes in the cell.
D It will be unable to photosynthesize.

10. 12. This diagram shows a plant cell
12. This diagram shows a plant cell. Which structures are found in a plant cell but are absent in an animal cell?

11. 13. What happens in phloem?
Water is transported up.
Food (carbohydrates) is transported down.
Spores are transported up.
Seeds are transported down

12. 14. What is NOT a function of the leaf's veins (vascular tissue)?
to bring water to the leaf's cells
to connect the leaf with the rest of the plant
to trap the energy of sunlight
to transport food to the rest of the plant

13. 15. How do insects assist in pollination?

14. 16. What is NOT a root function in plants?
to absorb water
to store food
to anchor plants
to produce food

15. 17. Flowers are structures for reproduction
17. Flowers are structures for reproduction. The following picture shows the ______ which is the male/female part of a flower.

16. 18. Explain the relationship between photosynthesis and cellular respiration.

17. 19. What is transpiration?
20. Which of the following parts of a plant are involved in transpiration: xylem, phloem, stomata, anther, roots, stamen

18. 21. Where does meiosis occur?

19. Give an example of each of the following tropisms
22. gravitropism
23. thigmotropism
24. hydrotropism
25. phototropism

20. 26. Copy and complete the sentence: The male gamete of a flower is called _________ and the female gamete of a flower is called ________.

21. 27. Use the following words to describe plant transport: water, food, phloem, xylem, up, down.

22. 28. Which of the following would show the most thigmotropism?
the tallest pine tree in a forest
a vine growing up the side of a tall tree
algae blooming in a pond
a rosebush growing in a garden

23. Copy the bolded answer and picture
30. This picture is of a (lipid, carbohydrate, protein, nucleic acid) and it can be found in the plant’s (cuticle, phloem)
29. This picture is of a (lipid, carbohydrate, protein, nucleic acid) and it can be found in the plant’s (cuticle, phloem)

24. 31. What process causes wounds in plants or animals to heal?

25. 32. Where do photosynthesis and cellular respiration occur?

26. 33. What is occurring at point X in the graph?

27. 34. How does a plant’s response system help with fruit production?