Question 1

The leaves of cacti

Accepted Answer

A)  don't exist. 
B)  are dropped during periods of drought. 
C)  have been modified into spines. 
D)  are very large to absorb plenty of sunlight. 
A)  don't exist. 
B)  are dropped during periods of drought. 
C)  have been modified into spines. 
D)  are very large to absorb plenty of sunlight. C

Question 2

What will happen after a gardener cuts off all the developing flowers on a tomato plant, with the exception of 12 of the flowers that have already been pollinated and set fruit?

Accepted Answer

A)  The tomato plant will drop the 12 previously pollinated flowers. 
B)  The tomato plant will become dormant until next year and then 12 tomatoes will ripen. 
C)  The 12 tomatoes will develop fully on the plant, but they will be small and not very sweet. 
D)  The 12 tomatoes will develop, and they will be larger and sweeter than if the other flowers remained. 
A)  The tomato plant will drop the 12 previously pollinated flowers. 
B)  The tomato plant will become dormant until next year and then 12 tomatoes will ripen. 
C)  The 12 tomatoes will develop fully on the plant, but they will be small and not very sweet. 
D)  The 12 tomatoes will develop, and they will be larger and sweeter than if the other flowers remained. D

Question 3

What effect does pruning flowers have on a plant?

Accepted Answer

A)  The plant will make more flowers than normal. 
B)  The new flowers that grow will be larger. 
C)  The plant will produce more leaves. 
D)  The plant will produce fruits instead of flowers. 
A)  The plant will make more flowers than normal. 
B)  The new flowers that grow will be larger. 
C)  The plant will produce more leaves. 
D)  The plant will produce fruits instead of flowers. C

Question 4

Plants that have undergone a gradual cooling period and are able to resist cold environmental temperatures are referred to as ________.

Accepted Answer

The answer of Plants that have undergone a gradual cooling...

Question 5

Plants that live for one year are called

Accepted Answer

A)  annuals. 
B)  biennials. 
C)  perennials. 
D)  woody plants. 
A)  annuals. 
B)  biennials. 
C)  perennials. 
D)  woody plants.

Question 6

-Whereas vessel elements produce ________ friction on the flow of water than tracheids, they result in ________.

Accepted Answer

A)  more; a reduced risk of an embolism 
B)  less; a greater risk of an embolism 
C)  more; reduced rates of water loss from leaves during a drought 
D)  less; the prevention of water loss from leaves during a drought 
A)  more; a reduced risk of an embolism 
B)  less; a greater risk of an embolism 
C)  more; reduced rates of water loss from leaves during a drought 
D)  less; the prevention of water loss from leaves during a drought

Question 7

The xylem tubes of drought-adapted plant species have narrow, tapering cells called ________.

Accepted Answer

The answer of The xylem tubes of drought-adapted plant species...

Question 8

Plants that live for many years and produce flowers every year are called ________.

Accepted Answer

The answer of Plants that live for many years and...

Question 9

Gymnosperms are also called

Accepted Answer

A)  liverworts. 
B)  mosses. 
C)  ferns. 
D)  conifers. 
A)  liverworts. 
B)  mosses. 
C)  ferns. 
D)  conifers.

Question 10

Plants can change rates of transpiration by

Accepted Answer

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

Question 11

What type of force moves water up a tree, from its roots to its leaves?

Accepted Answer

A)  pushing 
B)  pulling 
C)  pumping 
D)  positive pressure 
A)  pushing 
B)  pulling 
C)  pumping 
D)  positive pressure

Question 12

Where would you expect a plant with the largest leaves to grow?

Accepted Answer

A)  in sunny conditions 
B)  in shady sites 
C)  in dry conditions 
D)  in very sandy soils 
A)  in sunny conditions 
B)  in shady sites 
C)  in dry conditions 
D)  in very sandy soils

Question 13

Plants living in areas with moist soils are most likely to have

Accepted Answer

A)  many narrow, tapering tracheids. 
B)  lots of wide, perforated vessel elements. 
C)  frequent embolisms and loss of tension. 
D)  reduced transpiration rates. 
A)  many narrow, tapering tracheids. 
B)  lots of wide, perforated vessel elements. 
C)  frequent embolisms and loss of tension. 
D)  reduced transpiration rates.

Question 14

Which type of plant would have the greatest rate of transpiration during the day?

Accepted Answer

A)  a cactus 
B)  a plant with many large leaves 
C)  a plant with few and small leaves 
D)  a C4 plant that grows in a hot, sunny, dry environment 
A)  a cactus 
B)  a plant with many large leaves 
C)  a plant with few and small leaves 
D)  a C4 plant that grows in a hot, sunny, dry environment

Question 15

The response of a plant to the proportion of light and dark in a day is called ________.

Accepted Answer

The answer of The response of a plant to the...

Question 16

The tallest living tree, standing 112 meters (367 feet)tall, is a redwood (Sequoia sempervirens)located in California. The tallest trees in the world, such as redwoods, are gymnosperms because

Accepted Answer

A)  only gymnosperms have xylem cells, which assist in transpiration. 
B)  their very stiff xylem cells support the increase in height and weight. 
C)  only gymnosperms can transport water so high off the ground via negative water pressure. 
D)  deciduous trees possess cohesion but lack the adhesion necessary for water tension. 
A)  only gymnosperms have xylem cells, which assist in transpiration. 
B)  their very stiff xylem cells support the increase in height and weight. 
C)  only gymnosperms can transport water so high off the ground via negative water pressure. 
D)  deciduous trees possess cohesion but lack the adhesion necessary for water tension.

Question 17

The most simple terrestrial plants, in terms of plant structure, include

Accepted Answer

A)  ferns. 
B)  mosses. 
C)  gymnosperms. 
D)  liverworts. 
A)  ferns. 
B)  mosses. 
C)  gymnosperms. 
D)  liverworts.

Question 18

Which of the following 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 19

Both C4 and CAM pathways of photosynthesis allow plants to

Accepted Answer

A)  perform photosynthesis in the absence of carbon dioxide. 
B)  outcompete C3 plants in cool, dry conditions. 
C)  keep stomata partially or completely closed during the hottest parts of the day. 
D)  take up carbon dioxide at night and then store it as an acid until the day. 
A)  perform photosynthesis in the absence of carbon dioxide. 
B)  outcompete C3 plants in cool, dry conditions. 
C)  keep stomata partially or completely closed during the hottest parts of the day. 
D)  take up carbon dioxide at night and then store it as an acid until the day.

Question 20

Ice formation can destroy plant cells when

Accepted Answer

A)  water flows into cells via osmosis as the temperature drops. 
B)  adhesion increases inside xylem tubes. 
C)  jagged ice crystals puncture cell membranes. 
D)  cells are poisoned by dissolved "antifreeze" solutes. 
A)  water flows into cells via osmosis as the temperature drops. 
B)  adhesion increases inside xylem tubes. 
C)  jagged ice crystals puncture cell membranes. 
D)  cells are poisoned by dissolved "antifreeze" solutes.

Exam 24: Growing a Green Thumb: Plant Physiology

The leaves of cacti

What will happen after a gardener cuts off all the developing flowers on a tomato plant, with the exception of 12 of the flowers that have already been pollinated and set fruit?

What effect does pruning flowers have on a plant?

Plants that have undergone a gradual cooling period and are able to resist cold environmental temperatures are referred to as ________.

Plants that live for one year are called

-Whereas vessel elements produce ________ friction on the flow of water than tracheids, they result in ________.

The xylem tubes of drought-adapted plant species have narrow, tapering cells called ________.

Plants that live for many years and produce flowers every year are called ________.

Gymnosperms are also called

Plants can change rates of transpiration by

What type of force moves water up a tree, from its roots to its leaves?

Where would you expect a plant with the largest leaves to grow?

Plants living in areas with moist soils are most likely to have

Which type of plant would have the greatest rate of transpiration during the day?

The response of a plant to the proportion of light and dark in a day is called ________.

The tallest living tree, standing 112 meters (367 feet)tall, is a redwood (Sequoia sempervirens)located in California. The tallest trees in the world, such as redwoods, are gymnosperms because

The most simple terrestrial plants, in terms of plant structure, include

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

Both C4 and CAM pathways of photosynthesis allow plants to

Ice formation can destroy plant cells when

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

Filters

-Whereas vessel elements produce friction on the flow of water than tracheids, they result in .

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

Both C₄ and CAM pathways of photosynthesis allow plants to