Question 1

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 2

The "pulling" of a water column from the soil to the leaves is due to

Accepted Answer

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

Question 3

Cytosol leaks into plant cell vacuoles when

Accepted Answer

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

Question 4

Plant hormones

Accepted Answer

A)  are produced in small amounts but have great effects. 
B)  break down quickly after they are produced. 
C)  act only at the location where they are produced. 
D)  generally have one limited effect on the plant. 
A)  are produced in small amounts but have great effects. 
B)  break down quickly after they are produced. 
C)  act only at the location where they are produced. 
D)  generally have one limited effect on the plant.

Question 5

Which of the following is most similar to the way in which water is moved through the xylem sap of a plant?

Accepted Answer

A)  a person drinking through a straw 
B)  a vaccine being ejected out of a syringe 
C)  water gushing up from a fountain 
D)  a dart being blown out the end of a blowgun 
A)  a person drinking through a straw 
B)  a vaccine being ejected out of a syringe 
C)  water gushing up from a fountain 
D)  a dart being blown out the end of a blowgun

Question 6

Which of the following 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 7

Deciduous plants drop their leaves through a process called

Accepted Answer

A)  thigmotropism. 
B)  gravitropism. 
C)  abscission. 
D)  photoperiodism. 
A)  thigmotropism. 
B)  gravitropism. 
C)  abscission. 
D)  photoperiodism.

Question 8

Plants that drop their leaves on an annual basis are called

Accepted Answer

A)  annuals. 
B)  perennials. 
C)  deciduous. 
D)  biennials. 
A)  annuals. 
B)  perennials. 
C)  deciduous. 
D)  biennials.

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

Which of the following is a photosensitive chemical that 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 11

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 of these actions 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 12

Plants that flower only if day length is less than a critical value are called

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 13

The cold tolerance of a plant is called its

Accepted Answer

A)  photoperiodism. 
B)  persistence. 
C)  hardiness. 
D)  apical dominance. 
A)  photoperiodism. 
B)  persistence. 
C)  hardiness. 
D)  apical dominance.

Question 14

In plants, embolisms are

Accepted Answer

A)  toxic acids produced when stomata are closed and it's sunny. 
B)  formations of ice crystals when a plant is subjected to below-freezing temperatures. 
C)  hormones that result in apical dominance. 
D)  air bubbles that form within xylem. 
A)  toxic acids produced when stomata are closed and it's sunny. 
B)  formations of ice crystals when a plant is subjected to below-freezing temperatures. 
C)  hormones that result in apical dominance. 
D)  air bubbles that form within xylem.

Question 15

Many deciduous plants are adapted to drop their leaves

Accepted Answer

A)  when overwatered. 
B)  during summer. 
C)  during droughts. 
D)  whenever daylight cycles shorten. 
A)  when overwatered. 
B)  during summer. 
C)  during droughts. 
D)  whenever daylight cycles shorten.

Question 16

Why DON'T water molecules located within a column of xylem sap move apart?

Accepted Answer

A)  Cohesion holds the water molecules to each other; adhesion holds water molecules to the cellulose in plant cell walls. 
B)  Adhesion holds the water molecules to each other; tension holds water molecules to the cellulose in plant cells walls. 
C)  Tension holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls. 
D)  Adhesion holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls. 
A)  Cohesion holds the water molecules to each other; adhesion holds water molecules to the cellulose in plant cell walls. 
B)  Adhesion holds the water molecules to each other; tension holds water molecules to the cellulose in plant cells walls. 
C)  Tension holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls. 
D)  Adhesion holds the water molecules to each other; cohesion holds water molecules to the cellulose in plant cell walls.

Question 17

Which of the following allows a plant to conserve water?

Accepted Answer

A)  increasing photosynthesis during the day 
B)  opening stomata only at night 
C)  possessing large leaves 
D)  developing wide vessel elements 
A)  increasing photosynthesis during the day 
B)  opening stomata only at night 
C)  possessing large leaves 
D)  developing wide vessel elements

Question 18

Dormancy is

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 19

To make a shrub bushier, a person can ________ the topmost leaves and buds, resulting in reduced apical dominance.

Accepted Answer

A)  deadhead 
B)  harden 
C)  pinch back 
D)  translocate 
A)  deadhead 
B)  harden 
C)  pinch back 
D)  translocate

Question 20

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

Accepted Answer

critical n

Exam 24: Growing a Green Thumb: Plant Physiology

What will happen to a houseplant that's overwatered?

The "pulling" of a water column from the soil to the leaves is due to

Cytosol leaks into plant cell vacuoles when

Plant hormones

Which of the following is most similar to the way in which water is moved through the xylem sap of a plant?

Which of the following is an example of a CAM plant?

Deciduous plants drop their leaves through a process called

Plants that drop their leaves on an annual basis are called

Which plant hormone is responsible for apical dominance?

Which of the following is a photosensitive chemical that allows plants to "measure" day length?

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 of these actions would accomplish that goal?

Plants that flower only if day length is less than a critical value are called

The cold tolerance of a plant is called its

In plants, embolisms are

Many deciduous plants are adapted to drop their leaves

Why DON'T water molecules located within a column of xylem sap move apart?

Which of the following allows a plant to conserve water?

Dormancy is

To make a shrub bushier, a person can ________ the topmost leaves and buds, resulting in reduced apical dominance.

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

Can Science Cure the Common Cold? Introduction to the Scientific Method

Are We Alone in the Universe? Water, Biochemistry, and Cells

Is It Possible to Supplement Your Way to Better Health?

Fat: How Much is Right for You? Enzymes, Metabolism, and Cellular Respiration

Life in the Greenhouse: Photosynthesis and Global Warming

Cancer: DNA Synthesis, Mitosis, and Meiosis

Are You Only as Smart as Your Genes? Mendelian and Quantitative Genetics

DNA Detective: Complex Patterns of Inheritance and DNA Fingerprinting

Genetically Modified Organisms: Gene Expression, Mutation, and Cloning

Where Did We Come From? The Evidence for Evolution

An Evolving Enemy: Natural Selection

Who Am I? Species and Races

Prospecting for Biological Gold: Biodiversity and Classification

Is the Human Population Too Large? Population Ecology

Conserving Biodiversity: Community and Ecosystem Ecology

Where Do You Live? Climate and Biomes

Organ Donation: Tissues Organs and Organ Systems

Clearing the Air: Respiratory Cardiovascular and Excretory Systems

Vaccinations: Protection and Prevention or Peril? Immune System

Sex Differences and Athleticism: Endocrine Skeletal and Muscular Systems

Is There Something in the Water? Reproductive and Developmental Biology

Attention Deficit Disorder: Brain Structure and Function

Feeding the World: Plant Structure and Growth

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