Test 12 review questions

6th Grade Science

Chapter 12 Plant

Processes

Chapter Review

Questions

Keukenhof Gardens - Holland

Word Bank A

• Gravitropism

• Photosynthesis

• Photoperiodism

• Phototropism

• Short-day

• Day-neutral

• Long-day

Chapter 12 Review QuestionsWord Banks

Word Bank B

• Stimulus

• Hormone

• Tropism

• Phototropism

• Thigmotropism

• Respiration

• Palisade layer

Word Bank C

• Auxin

• Ethylene

• Cytokinin

• Abscisic acid

• Chlorophyll

• Gibberellin

1. A plants response to gravity is called ______.

a. phototropism c. photosynthesis

b. gravitropism d. photoperiodism

Answer:

gravitropism

Chapter 12Review Questions

2. The process of food-making in plants is _____.a. chlorophyll c. stomatab. photosynthesis d. carotenoids

Answer:

photosynthesis


3. A flowering response of a plant to length of light and dark is called ______.a. phototropism c. photosynthesisb. gravitropism d. photoperiodism

Answer:

photoperiodism


4. A plants growth response to light is called ______.

a. phototropism c. photosynthesis

b. gravitropism d. photoperiodism

Answer:

phototropism


5. _______ plants require long nights to flower.a. long-day c. respirationb. short-day d. photosynthesis

Answer:

Short-day


6. _______ plants require short days to flower.a. long-day c. respirationb. short-day d. photosynthesis

Answer:

short-day


7. _______ is the process of releasing energy from food.

a. long-day c. respiration

b. short-day d. photosynthesis

Answer:

Respiration


8. _______ is the process of using light energy to make food.a. long-day c. respirationb. short-day d. photosynthesis

Answer:

photosynthesis


9. _______ plants flower over a wide range of dark periods.a. long-day c. day-neutralb. short-day d. photosynthesis

Answer:

Day-neutral


10. _____ is anything in the environment that affects the behavior of an organism.a. stomata c. hormoneb. tropism d. stimulus

Answer:

stimulus


11. _____ is an internal stimulus of a plant.a. stomata c. hormoneb. tropism d. stimulus

Answer:

hormone


12. _____ is an external stimulus of a plant.a. stomata c. hormoneb. tropism d. stimulus

Answer:

tropism


13. _____ is a plant’s response to gravity.

a. phototropism c. thigmotropism

b. gravitropism d. stimulus

Answer:

gravitropism


14. _____ is a plant’s response to light.



Answer:

phototropism


15. _____ is a plant’s response to touch.



Answer:

thigmotropism


16. _____ is the response of roots growing downward.

a. negative phototropism c. negative gravitropism

b. positive phototropism d. positive gravitropism

Answer:

Positive gravitropism


17. _____ is the response of stems growing upward.a. negative phototropism c. negative gravitropismb. positive phototropism d. positive gravitropism

Answer:

Negative gravitropism


18. _____ is the response of a stem growing toward the light.a. negative phototropism c. negative gravitropismb. positive phototropism d. positive gravitropism

Answer:

Positive phototropism


Answer:

Longer on the shaded side of the stem

19. Auxins cause cells to grow ______.a. Longer on the sunny side of the stemb. Longer on the shaded side of the stemc. Shorter on the sunny side of the stemd. Shorter on the shaded side of the stem


20. Ethylene gas does NOT ______.

a. Ripen fruit c. cause leaves to fall off

b. Lengthen stems d. cause leaves to change color

Answer:

Lengthen stems


21. _____ is a plant hormone that causes a plant to show positive phototropism.

a. Auxin c. ethylene

b. cytokinin d. Abscisic acid

Answer:

Auxin


22. _____ is a plant hormone that causes rapid growth and helps stored vegetables stay fresh.



Answer:

ethylene


23. _____ is a plant hormone that prevents seeds from sprouting to soon.



Answer:

Abscisic acid


24. _____ is a green pigment in plants.

a. Auxin c. chlorophyll


Answer:

chlorophyll


25. Most carbon dioxide enters the plants through stomata on the ______.

a. Lower surface of leaves c. tips of the stems

b. Root tips d. upper surface of leaves

Answer:

Lower surface of leaves


26. Light, ____, and carbon dioxide all affect the opening and closing of the stomata.

a. gravity c. minerals

b. insects d. water

Answer:

water


27. The plant hormone that causes stomata to close and that helps plants respond to water loss is ___.

a. cytokinin c. gibberellin

b. auxin d. abscisic

Answer:

auxin


28. The plant hormone that stimulates plant stem growth and seeds to germinate is ______.a. cytokinin c. gibberellinb. auxin d. abscisic

Answer:

gibberelin


29. The green colors of tree leaves are due to _____ in the leaves.a. auxins c. pigmentsb. carbon dioxide d. chlorophyll

Answer:

chlorophyll


30. Most of the plants food is made in the _______ layer.a. palisade layer c. lower epidermisb. spongy layer d. upper epidermis

Answer:

Palisade layer


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