Chapter 6 Quiz

Question 1

Growth slows or stops

Answer 1

0 C (32 F)

Question 2

proteins are denatured or destroyed

Answer 2

50 C (122 F)

Question 3

generic minimum threshold temperature for WARM season plants

Answer 3

10 C (50 F)

Question 4

generic minimum threshold temperature for COOL season plants

Answer 4

5 C (40 F)

Question 5

Which of the following is the most correct statement about temperature and the rate of chemical processes?

• As temperature increases, the rate of chemical reactions decreases.
• As temperature increases, the rate of chemical reactions increases until a maximum temperature where the relationship breaks down.
• As temperature increases, the rate of chemical processes increases exponentially.
• As temperature increases, the rate of chemical reactions remains the same.

Answer 5

As temperature increases, the rate of chemical reactions increases until a maximum temperature where the relationship breaks down.

Question 6

Most plant growth occurs at _______ because the ________ close and the ________ increases within the plant.

Answer 6

night, stomates, turgor pressure

Question 7

Light compensation point

Answer 7

photosynthesis = respiration

Question 8

Light saturation point

Answer 8

point where light is no longer the limiting factor in photosynthesis rates

Question 9

DIF

Answer 9

day temperature minus night temperature

Question 10

Which of the following is the most correct statement about the relationship between sugar and starch?

• As temperatures increase, starch is converted to sugar at an exponential rate.
• As temperatures increase, sugar is converted to starch more rapidly.
• As temperatures increase, sugar is converted to starch more slowly.
• As temperatures decrease, sugar is converted to starch.

Answer 10

As temperatures increase, sugar is converted to starch more rapidly.

Question 11

T/F: Even though manipulating DIF is effective in controlling plant height, it is not commonly used because it requires too much energy to do.

Answer 11

True

Question 12

The best red fall colors occur when days are bright and warm AND nights are ___________ because __________ rates exceed __________ rates and the excess sugars increase the production of __________.

Answer 12

bright and warm, cool, photosynthesis, respiration, anthocyanins

Question 13

The most energy-efficient greenhouse design ______________.

Answer 13

Minimizes the surface area to volume ratio

Question 14

Number of hours between 0 and 7 C (32 and 45 F) required for floral initiation and flowering

Answer 14

chilling hours

Question 15

State of rest where a seed/plant will not germinate/grow even if conditions are favorable

Answer 15

dormancy

Question 16

Moist cold treatment for seeds that simulates winter and breaks dormancy

Answer 16

stratification

Question 17

Cold treatment for a certain period of time required for some plants to flower properly

Answer 17

vernalization

Question 18

Which of the following is NOT a way to conserve energy in a greenhouse or controlled environment?

• Use space efficiently
• Close during the coldest months of the year in the north
• Thermal blankets
• Replace your old air conditioning unit

Answer 18

-Replace your old air conditioning unit