Key Plant Unit Test Multiple Choice

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1 Plant Unit Test Multiple Choice For questions 1 25, circle the letter of the best answer from the choices provided. (2 pts each) For questions 1 3, refer to the diagram of the plant cell below: A B C D 1. Photosynthesis most likely occurs in which structure? a. A b. B c. C d. D 2. Which structure is most likely absent in heterotrophic cells? a. A b. B c. C d. D 3. Which structure is least helpful in identifying this cell type? a. A b. B c. C d. D 4. A researcher has found a new organism that is multicellular. Which microscopic organelles could she look to decide whether it is a plant? a. Cell membrane and mitochondria b. Cell wall and cell membrane c. Cell wall and chloroplasts d. Cell wall and nucleus 5. Which is found in both animal and plant cells? a. Cell wall b. Chlorophyll c. Chloroplasts d. Mitochondria 6. What is the main function of a plant vacuole? a. Movement b. Photosynthesis c. Protection d. Storage

2 7. A student observes a cell under a microscope that has a cell wall and mitochondria, but no chloroplasts. Which type of cell was the student most likely seeing? a. Animal cell b. Bacterium cell c. Fungus cell d. Plant cell 8. Plants are generally green because. a. their cells contain chlorophyll b. they absorb green light c. they are made of mostly water d. they absorb green nutrients from the soil 9. A plant is attacked by a disease that destroys chloroplasts. What will most likely happen to the plant? a. It will stop growing but will not die. b. It will no longer absorb radiant energy and will die. c. It will no longer transpire and will die. d. It will absorb more nutrients using its roots to grow and live. 10. Which of these processes is carried out in the same way in both plants and animals? a. Asexual reproduction b. Cellular respiration c. Circulation of body fluids d. Excretion of metabolic waste 11. Algae and multicellular plants are autotrophs because they. a. absorb nutrients from soil b. break down starches to glucose c. capture sunlight to produce sugars d. decompose dead organisms 12. The processes of photosynthesis and respiration can be thought of as a cycle because. a. both give off oxygen to be used by animals b. one is used only by plants and the other is used only by animals c. they both have the same purpose d. the products of one are used as the raw materials of the other 13. Unlike plants, fungi cannot make their own food because they do not have. a. chlorophyll b. hyphae c. roots d. spores 14. If you removed a ring of outer bark from around the entire circumference of a tree, what would most likely happen as a result? a. It could not transport sugar from the roots to the leaves. b. It could not transport sugar from the leaves to the roots. c. It could not transport water from the roots to the leaves. d. It could not transport water from the leaves to the roots. 15. While out walking in the woods, you discover a grove of pine trees. What is most likely true of these plants? a. They depend on animal pollinators. b. They produce fruit for dispersal. c. They require water for fertilization. d. They use wind to help in reproduction.

3 16. Tall land plants have requirements different from those of aquatic plants. Which of these must the tall land plants have that aquatic plants do not need? a. A means of reproduction b. Organelles for respiration c. Photosynthetic abilities d. Thick-celled walls 17. Which of the following is most effective in helping rain forest plants trap sunlight so that light energy can be converted to chemical energy? a. Large leaf size b. Large root size c. Small seed size d. Small stem 18. If transpiration stopped completely, how would a plant s homeostasis first be affected? a. Carbohydrates would no longer be formed. b. Fewer sugars stored in roots and stems would diffuse into the soil. c. More carbon dioxide molecules would be taken in by leaves. d. Water molecules would not be released from leaves. 19. When there is a lower concentration of water outside of a plant cell rather than inside a plant cell, the plant will tend to. a. gain water and become rigid b. grow toward the sun c. increase its rate of photosynthesis d. lose water and wilt 20. All plants require which of the following for survival? a. Flowers b. Oxygen c. Pollinators d. Water 21. A plant s growth in response to light is called. a. chemitropism b. gravitropism c. phototropism d. thigmotropsim 22. Hormones help control all of the following except. a. dormancy timing b. fruit ripening c. growth rate d. photosynthesis rate

4 For questions 23 25, refer to the following diagram: 23. The niche of the submerged aquatic vegetation most likely includes. a. converting light energy into chemical energy b. consuming phytoplankton for energy c. providing food for sea ducks d. reproduction with other types of vegetation 24. Which is least likely to perform photosynthesis? a. Phytoplankton b. Submerged Aquatic Vegetation c. Vegetation d. Zooplankton 25. Which population contains the most energy? a. Bald Eagle b. Geese and Mute Swans c. Tundra Swan d. Vegetation

pictured from the provided list and write the letter under the picture.

Angiosperm c. Seedless vascular plant d. Nonvascular plant 26. B 27. A 28. C 29.

B For questions 33 38, fill in the chart by choosing the plant structure that

corresponds to the human structure in the middle column.

(2 pts each) Epidermis Leaves Meristems Roots Stomata Vascular tissues Wood

5 Matching. For questions 26-32, choose the most appropriate classification of each plant pictured from the provided list and write the letter under the picture. Each classification may be used more than once. (2 pts each) a. Gymnosperm b. Angiosperm c. Seedless vascular plant d. Nonvascular plant 26. B 27. A 28. C 29. D 30. B 31. A 32. B For questions 33 38, fill in the chart by choosing the plant structure that accomplishes the function listed in the left column and most closely corresponds to the human structure in the middle column. Words from the word bank may be used more than once or not at all. (2 pts each) Epidermis Leaves Meristems Roots Stomata Vascular tissues Wood Seeds Flowers Function Human Structure Plant Structure Gas exchange Lungs 33. Leaves Circulation Blood vessels 34. Vascular Tissues Water intake Mouth 35. Roots Energy intake Mouth 36. Leaves Protective covering Skin 37. Epidermis Internal support Skeleton 38. Wood

6 Short Answer For questions 39 41, answer each question using complete sentences. Use additional paper if you need more space than has been provided. 39. Describe the role of plants in the flow of energy from the sun to heterotrophs. In your description, include the trophic level of plants, how their level of energy compares to other trophic levels, and the metabolic process they perform that is essential to this role, and why heterotrophs depend on them. (6 pts) Required Parts of Answer Plants perform photosynthesis which means they are autotrophs, so they are the producers in an ecosystem. Heterotrophs cannot perform photosynthesis so they must eat plants for the energy, and thus the flow of energy continues from sun through plants to consumers or heterotrophs. Answer in complete sentences and narrative form. Weight 40. Angiosperms have become the most successful group of plants on earth. Explain why they appear to have an advantage over other types of plants (including gymnosperms). Include in your explanation two structures that contribute to this advantage and their specific functions. (8 pts) Required Parts of Answer Angiosperms are plants that produce flowers and seeds packaged inside fruit. Other types of plants do not make these structures. Flowers help promote fertilization and reproduction by attracting pollinators. Fruit help protect seeds and promote seed dispersal since mobile animals can carry them to distant areas. Improved fertilization and dispersal improve genetic diversity in angiosperms. Answer is in complete sentences and in narrative form. Weight 41. One way plants adapted to life on land was the development of the seed. Identify four major advantages offered by seeds and give an example of how each helps a plant grow in Virginia. (10 pts) Required Parts of Answer Protection of the plant embryo + example (e.g. hardness of acorns from Oak trees) Dispersal of offspring + example (e.g. dandelion seeds floating in the air) Nourishment of the embryo before germination + example (e.g. the fleshy part of lima beans, peas, etc.) Delayed growth during poor growing conditions + example (e.g. you usually have to plant and water seeds in gardens, flower beds, etc. before they will grow) Answer is in complete sentences and in narrative form Weight

Structures and Functions of Living Organisms

Structures and Functions of Living Organisms 6.L.1 Understand the structures, processes and behaviors of plants that enable them to survive and reproduce. 6.L.1.1 Summarize the basic structures and functions