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Plant Processes 17

OverviewPlant Processes

Directions: Complete the concept map using the terms in the list below.

chlorophyl food molecules

respiration sugar

Directions: Answer the following questions on the lines provided.

5. Define tropism and give two examples.

6. What does photoperiodism refer to?

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chemical reactions

1.

energy

in which

3.

break down

and release

in which

light energy

traps

to produce

4.

2.

photosynthesis

Two plant processes are

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18 Plant Processes

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Section 1 ■ Photosynthesisand Respiration

Directions: Using the equation above, classify each of the terms below as a raw material or an end productof photosynthesis.

1. water

2. carbon dioxide

3. glucose

4. oxygen

5. light energy

Meeting Individual Needs

C6H12O6 + 6O2glucose oxygen

6CO2 + 6H2O + light energycarbondioxide

water

Photosynthesis

6CO2 + 6H2O + energycarbondioxide

waterglucose oxygenC6H12O6 + 6O2

Aerobic Respiration

Directions: Using the equation above, classify each of the terms below as a raw material or an end productof respiration.

6. carbon dioxide

7. oxygen

8. water

9. glucose

10. energy

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Plant Processes 19

ContentMastery

Section 2 ■ Plant Responses

Directions: Use the illustration to answer the questions below.

1. Describe what is causing the stem to grow upward in Figure A.

2. Describe what is causing the roots to grow downward in Figure A.

3. Describe what is causing the leaves and stem to grow upward at a slant in Figure B.

Directions: Circle the term in parentheses that correctly completes each sentence.

4. Anything in the environment that affects the behavior of an organism is called

a (stimulus/response).

5. (Long-day/Short-day) plants require long nights to flower.

6. Plant growers can use (carbon dioxide/ethylene) gas to speed up ripening.

7. The downward growth of plant roots is a positive response to (gravity/light).

8. (Auxin/Gibberellin) is a type of plant hormone that causes plant stems and leaves

to exhibit positive responses to light.

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Figure A Figure B

20 Plant Processes

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Key TermsPlant Processes

Directions: Draw a line to connect the description on the left to the correct term on the right.

1. structures on the surface of the leafthrough which carbon dioxide enters and oxygen and water vapor leave

2. the process of releasing energy from the breakdown of food in plants

3. the process of food-making in plants

4. plant hormone that prevents seeds from sprouting too soon

5. a plant’s response to an outside stimulus

6. plant hormone that causes a plant to show positive phototropism

7. plants that require less than 10–12 hours of darkness to flower

8. plants that have no specific photoperiod

9. a green pigment in plants

10. plant hormone that causes rapid growth and helps stored vegetables stay fresh

11. plants that need 12 or more hours of darknessto flower

Meeting Individual Needs

photosynthesis

abscisic acid

stomata

respiration

auxin

short-day

tropism

cytokinin

long-day

day-neutral

chlorophyll

short-day

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