WORD BANK
auxin---photoperiodism---cellular respiration---photosynthesis---chlorophyll
short-day plant---day-neutral plant---stomata---long-day plant---tropism
I. Comlete:
1. Auxin is a hormone that causes plant stems and leaves to exhibit positive phototropism
.
2. Photosynthesis is a light-dependent process conducted by green plants but not by animals.
3. Chlorophyll is required for photosynthesis.
4. A poinsettia, often seen flowering during december holidays, is a(n) short-day plant.
5. In most living things, energy is released from food by cellular respiration.
6. Spinach requires only 10 hours of darkness to flower, whick makes it a(n) long-day plant.
7. A(n) tropism can cause a plant to bend toward light.
8. Plants usually take in carbon dioxide through the stomata.
9. Photoperiodis controls a plant´s response to the numbers of hours in darkness.
10. Plants that flower whithout a specific photo period are day-neutral plants.
II. Multiple choice:
11. What raw material needed by plants enters through open stomata?
A) sugar C) carbon dioxide
B) chloropyll D) cellulose
12. What is a function of stomata?
A) photosynthesis B) to guard the interior cells
C) to allow sugar to escape D) to permit the release of oxygen
13. What plant process produces water, carbon dioxide, and energy?
A) cell division C) growth
B) photosynthesis D) cellular respiration
14. what are the product of photosynthesis?
A) glucose and oxygen B) carbon dioxide and water
C) chlorophyll and glucose D) carbon dioxide and oxygen
15. What are plant substances that affect plant growth called?
A) tropisms C) germination
B) glucose D) hormones
16. Leaves change colors because what substance breaks down?
A) hormone C) chlorophyll
B) carotenoid D) cytoplasm
17. Which is a product of cellular respiration?
A) CO2 C) C2H4
B) O2 D) H2
A) light C) touch
B) gravity D) water
19. You buy pears at the store thta are not completely ripe. What do you do to help them ripen rapidly?
I leave them in the refrigerator or outside so they can ripe and use them when they are ripen.
20. Name each tropism and state whether it is positive or negative.
A) stem grows up positive
B) roots grow down positive
C) plant grows toward light positive
D) a vine grows around a pole positive
21. scientists who study sedimentary rocks and fossils sugguest that oxygen was not in earth´s atmosphere until plantlike, 1-celled organism appeared. why?
Because they never found any plant fossils and the 1 they found was 420 million years old (2.5 CM tall)
22. Why do apple trees bloom in the spring but not in the summer.
Because they are long-day plants
23. Why do day-neutral and long-day plants grow best in countries near the equator.
Day-neutral plants because they are like a combination of long-day and short-day plants
and long-day plants because the equator has long day but short nights.
24. Form a hypothesis about when guard cells open and close in dessert plants.
Because in the heat of the day they capture the carbon dioxide in a form of acid and open at night for the next day do the photosynthesis.(Other ways for the plant is to curl there leaves so they dont lose the moisture in there body.)
25. Copy and complete the following information: flower year-round--corn, dandelion,tomato; flower in spring,fall or winter--chrysanthemum,rice,poinsetteia; flower in summer--spinach,lettuce,petunia.
CONCEPT MAP
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