Question 1

What causes the "pulling" of a water column from the soil to the leaves?

Accepted Answer

A)  hydrogen bonds 
B)  gravity 
C)  hardiness 
D)  active transport 
A)  hydrogen bonds 
B)  gravity 
C)  hardiness 
D)  active transport A

Question 2

What process is responsible for the flow of water through a plant, from the soil to the leaves?

Accepted Answer

A)  translocation 
B)  transpiration 
C)  respiration 
D)  internal pumping 
A)  translocation 
B)  transpiration 
C)  respiration 
D)  internal pumping B

Question 3

What is the negative water pressure in the xylem of a plant?

Accepted Answer

A)  torsion 
B)  cohesion 
C)  adhesion 
D)  tension 
A)  torsion 
B)  cohesion 
C)  adhesion 
D)  tension D

Question 4

When might cytosol leak into plant cell vacuoles?

Accepted Answer

A)  if water freezes outside a plant cell 
B)  if water freezes inside a plant cell 
C)  if severe drought conditions shut down normal rates of transpiration 
D)  if the critical night length isn't met 
A)  if water freezes outside a plant cell 
B)  if water freezes inside a plant cell 
C)  if severe drought conditions shut down normal rates of transpiration 
D)  if the critical night length isn't met

Question 5

What force is created by the negative water pressure resulting from water evaporating from the stomata of a leaf?

Accepted Answer

A)  cohesion 
B)  adhesion 
C)  tension 
D)  pressure flow 
A)  cohesion 
B)  adhesion 
C)  tension 
D)  pressure flow

Question 6

What is dormancy?

Accepted Answer

A)  the ability of a plant to produce fruits 
B)  a plant's annual rest period 
C)  the period of time between flowering and fruiting 
D)  another term for translocation 
A)  the ability of a plant to produce fruits 
B)  a plant's annual rest period 
C)  the period of time between flowering and fruiting 
D)  another term for translocation

Question 7

What are the narrow, tapering cells found in the xylem tubes of drought-adapted plant species?

Accepted Answer

The answer of What are the narrow, tapering cells found...

Question 8

What will happen to a houseplant that's overwatered?

Accepted Answer

A)  The leaves will burst. 
B)  The leaves will wilt. 
C)  The flowers will leak excess water. 
D)  It will grow faster than usual. 
A)  The leaves will burst. 
B)  The leaves will wilt. 
C)  The flowers will leak excess water. 
D)  It will grow faster than usual.

Question 9

Which plant hormone is responsible for apical dominance?

Accepted Answer

A)  auxin 
B)  ethylene 
C)  cytokinin 
D)  gibberellin 
A)  auxin 
B)  ethylene 
C)  cytokinin 
D)  gibberellin

Question 10

What type of plants flower only if day length is less than a critical value?

Accepted Answer

A)  short-day plants 
B)  long-day plants 
C)  biennial plants 
D)  perennial plants 
A)  short-day plants 
B)  long-day plants 
C)  biennial plants 
D)  perennial plants

Question 11

Which chemical is photosensitive and allows plants to "measure" day length?

Accepted Answer

A)  abscisic acid 
B)  malic acid 
C)  cytokinin 
D)  phytochrome 
A)  abscisic acid 
B)  malic acid 
C)  cytokinin 
D)  phytochrome

Question 12

Which hormone plays an "anti-abscission role" in plants?

Accepted Answer

A)  auxin 
B)  ethylene 
C)  gibberellin 
D)  cytokinin 
A)  auxin 
B)  ethylene 
C)  gibberellin 
D)  cytokinin

Question 13

Photoperiodic plants react to a certain amount of darkness, referred to as ________ (three words).

Accepted Answer

critical n

Question 14

Which plants store CO₂ in the form of malic acid and close their stomata during the day?

Accepted Answer

A)  C₃ plants 
B)  C₄ plants 
C)  CAM plants 
D)  hornworts and liverworts 
A)  C₃ plants 
B)  C₄ plants 
C)  CAM plants 
D)  hornworts and liverworts

Question 15

Which plant closes its stomata during the day and conducts photosynthesis using chemically stored carbon?

Accepted Answer

A)  moss 
B)  Kentucky bluegrass 
C)  jade plant 
D)  oak tree 
A)  moss 
B)  Kentucky bluegrass 
C)  jade plant 
D)  oak tree

Question 16

Which plant has the greatest hardiness (can tolerate the lowest temperature)?

Accepted Answer

A)  a tomato plant 
B)  a cabbage plant 
C)  an apple tree 
D)  a houseplant that evolved in the tropics 
A)  a tomato plant 
B)  a cabbage plant 
C)  an apple tree 
D)  a houseplant that evolved in the tropics

Question 17

Why do florists and horticulturists often cut stems while they're holding a plant underwater?

Accepted Answer

A)  to avoid transpiration 
B)  to prevent dormancy 
C)  to disrupt apical dominance 
D)  to avoid formation of an embolism 
A)  to avoid transpiration 
B)  to prevent dormancy 
C)  to disrupt apical dominance 
D)  to avoid formation of an embolism

Question 18

Which is an example of a CAM plant?

Accepted Answer

A)  sugarcane 
B)  corn 
C)  crabgrass 
D)  aloe plant 
A)  sugarcane 
B)  corn 
C)  crabgrass 
D)  aloe plant

Question 19

A greenhouse manager wants to encourage long-term, productive flowering instead of short-term, rapid flowering in annual garden plants that are for sale. Which action would accomplish that goal?

Accepted Answer

A)  pruning away early flowers 
B)  limiting water and fertilizer 
C)  moving the plants to the shadiest part of the greenhouse 
D)  allowing any flowers to become fruits and seeds 
A)  pruning away early flowers 
B)  limiting water and fertilizer 
C)  moving the plants to the shadiest part of the greenhouse 
D)  allowing any flowers to become fruits and seeds

Question 20

How can plants change rates of transpiration?

Accepted Answer

A)  by changing the size of stomata openings 
B)  by making a cellulose plug in the xylem tubes 
C)  by promoting flowering 
D)  by reducing cohesion 
A)  by changing the size of stomata openings 
B)  by making a cellulose plug in the xylem tubes 
C)  by promoting flowering 
D)  by reducing cohesion

Exam 25: Growing a Green Thumb: Plant Physiology

What causes the "pulling" of a water column from the soil to the leaves?

What process is responsible for the flow of water through a plant, from the soil to the leaves?

What is the negative water pressure in the xylem of a plant?

When might cytosol leak into plant cell vacuoles?

What force is created by the negative water pressure resulting from water evaporating from the stomata of a leaf?

What is dormancy?

What are the narrow, tapering cells found in the xylem tubes of drought-adapted plant species?

What will happen to a houseplant that's overwatered?

Which plant hormone is responsible for apical dominance?

What type of plants flower only if day length is less than a critical value?

Which chemical is photosensitive and allows plants to "measure" day length?

Which hormone plays an "anti-abscission role" in plants?

Photoperiodic plants react to a certain amount of darkness, referred to as ________ (three words).

Which plants store CO₂ in the form of malic acid and close their stomata during the day?

Which plant closes its stomata during the day and conducts photosynthesis using chemically stored carbon?

Which plant has the greatest hardiness (can tolerate the lowest temperature)?

Why do florists and horticulturists often cut stems while they're holding a plant underwater?

Which is an example of a CAM plant?

A greenhouse manager wants to encourage long-term, productive flowering instead of short-term, rapid flowering in annual garden plants that are for sale. Which action would accomplish that goal?

How can plants change rates of transpiration?

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