Question 1

Why canʹt plants use N2 directly as a nutrient?

Accepted Answer

A)   N2 diffuses out of leaves as quickly as it diffuses in, so it has to be ʺfixedʺ to remain in leaves.
B)   Plants lack the enzymes necessary to convert N2 into NO3−or NH4+.
C)   Most soils are depleted of N2 as a nutrient.
D)   Plants must use NO3− to carry out nitrogen fixation.
E)   The N2 molecule is too large to enter the stomata.

Question 2

How does carbon dioxide enter a leaf?

Accepted Answer

A)   CO2 passes through openings called stomata on the leaf surface.
B)   Dissolved CO2 is transported from roots to leaves in the xylem.
C)   CO2 is moved by active transport into the leaf by special cells called guard cells.
D)   Atmospheric pressure forces CO2 through pits on the leaf surface.
E)   CO2 diffuses through the epidermis into the mesophyll.

Question 3

Root hairs develop from the

Accepted Answer

A)   epidermis.
B)   cortex.
C)   Casparian strip.
D)   endodermis.
E)   pericycle.

Question 4

When potassium ions are transported into guard cells, water

Accepted Answer

A)   is actively transported into the guard cells.
B)   enters the guard cells by osmosis.
C)   leaves the guard cells by osmosis.
D)   is actively transported out of the guard cells.
E)   moves to the edge of the guard cell.

Question 5

Examination of a woody stem reveals that some tissues are dead at maturity. These dead tissues are

Accepted Answer

A)   vascular cambium and primary phloem.
B)   primary phloem and periderm.
C)   secondary xylem and secondary phloem.
D)   sapwood and bark.
E)   cork and heartwood.

Question 6

The guard cells shown in this figure have

Accepted Answer

A)   lost most of their water.
B)   eliminated all potassium ions.
C)   accumulated potassium ions.
D)   lost potassium ions.

Question 7

During the spring, newly emerging leaves are sugar___________ and tree roots are sugar ___________.

Accepted Answer

A)   sinks; sinks
B)   sinks; sources
C)   sources; sources
D)   sources; sinks

Question 8

Which of these organisms helped biologists determine the contents of phloem?

Accepted Answer

A)   Aphids
B)   Grasshoppers
C)   Ants
D)   Termites
E)   Leafhoppers

Question 9

In the spring, when stored starches convert back to sugars and move from the root of a plant to the developing buds, the root is the sugar ___________and the bud is the sugar___________.

Accepted Answer

The answer of In the spring, when stored starches convert...

Question 10

Based on the figure, estimate the age of this tree in years.

Accepted Answer

A)   13 to 15
B)   3 to 5
C)   over 35
D)   8 to 10
E)   20 to 25

Question 11

Which of the following is NOT true of sclerenchyma tissue?

Accepted Answer

A)   It dies at maturity.
B)   It is a storage site for sugars and starches.
C)   It provides support to strengthen the plant.
D)   It is made up of cells with thickened cell walls.
E)   It is associated with xylem and phloem in the vascular tissue system.

Question 12

_________cells that convert sugar to starch in mature roots are part of the_________ tissue system.

Accepted Answer

A)   Periderm; dermal
B)   Phloem; vascular
C)   Xylem; vascular
D)   Companion; ground
E)   Parenchyma; ground

Question 13

Periderm consists of mostly

Accepted Answer

A)   undifferentiated cells.
B)   endodermis.
C)   cork cells.
D)   lateral meristem.
E)   epidermis.

Question 14

Because most of the trunk of a tree is made of xylem, it is safe to say that most of the tissue in a tree is

Accepted Answer

A)   manufacturing sugars.
B)   conducting sugars.
C)   used for storage.
D)   dead.
E)   dividing rapidly.

Question 15

A plant, by opening and closing its stomata, must achieve a balance between

Accepted Answer

A)   water loss and carbon dioxide uptake.
B)   oxygen loss and water uptake.
C)   carbon dioxide uptake and oxygen loss.
D)   carbon dioxide loss and sugar uptake.
E)   sugar loss and oxygen uptake.

Question 16

Of the major tissue systems associated with land plants, the_________ tissue system covers the outer surface of the primary plant.

Accepted Answer

A)   vascular
B)   ground
C)   parenchyma
D)   dermal
E)   meristem

Question 17

Plant cells that are actively dividing are _________cells.

Accepted Answer

A)   conducting
B)   vascular
C)   meristem
D)   differentiated
E)   ground

Question 18

Bacteria-containing nodules in the roots of legume plants aid in the utilization of

Accepted Answer

A)   trace elements.
B)   carbon dioxide.
C)   nitrogen.
D)   phosphates.
E)   water.

Question 19

Most conifers have only tracheids. Which structural feature allows water and minerals to pass from one tracheid to the next?

Accepted Answer

A)   Sieve plates
B)   Secondary cell walls
C)   Stomata
D)   Plasmodesmata
E)   Pits

Question 20

Plants need to minimize water loss while maximizing carbon dioxide intake. With respect to plant leaf structure, how are these conflicting needs met?

Accepted Answer

The cuticle acts as a waterproof barrier...

Exam 44: Plant Anatomy and Nutrient Transport

Which of these organisms helped biologists determine the contents of phloem?

Correct AnswerverifiedShow Answer

In the spring, when stored starches convert back to sugars and move from the root of a plant to the developing buds, the root is the sugar ___________and the bud is the sugar___________.

Correct AnswerverifiedShow Answer

How does carbon dioxide enter a leaf?

Correct AnswerverifiedShow Answer

Root hairs develop from the

Correct AnswerverifiedShow Answer

Plants need to minimize water loss while maximizing carbon dioxide intake. With respect to plant leaf structure, how are these conflicting needs met?

Correct AnswerverifiedThe cuticle acts as a waterproof barrier...View AnswerShow Answer

Examination of a woody stem reveals that some tissues are dead at maturity. These dead tissues are

Correct AnswerverifiedShow Answer

Because most of the trunk of a tree is made of xylem, it is safe to say that most of the tissue in a tree is

Correct AnswerverifiedShow Answer

Periderm consists of mostly

Correct AnswerverifiedShow Answer

Of the major tissue systems associated with land plants, the_________ tissue system covers the outer surface of the primary plant.

Correct AnswerverifiedShow Answer

Most conifers have only tracheids. Which structural feature allows water and minerals to pass from one tracheid to the next?

Correct AnswerverifiedShow Answer

During the spring, newly emerging leaves are sugar___________ and tree roots are sugar ___________.

Correct AnswerverifiedShow Answer

When potassium ions are transported into guard cells, water

Correct AnswerverifiedShow Answer

Based on the figure, estimate the age of this tree in years.

Correct AnswerverifiedShow Answer

_________cells that convert sugar to starch in mature roots are part of the_________ tissue system.

Correct AnswerverifiedShow Answer

Bacteria-containing nodules in the roots of legume plants aid in the utilization of

Correct AnswerverifiedShow Answer

Why canʹt plants use N2 directly as a nutrient?

Correct AnswerverifiedShow Answer

The guard cells shown in this figure have

Correct AnswerverifiedShow Answer

A plant, by opening and closing its stomata, must achieve a balance between

Correct AnswerverifiedShow Answer

Plant cells that are actively dividing are _________cells.

Correct AnswerverifiedShow Answer

Which of the following is NOT true of sclerenchyma tissue?

Correct AnswerverifiedShow Answer

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In the spring, when stored starches convert back to sugars and move from the root of a plant to the developing buds, the root is the sugar _and the bud is the sugar_.

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The cuticle acts as a waterproof barrier...
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During the spring, newly emerging leaves are sugar_ and tree roots are sugar _.

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_cells that convert sugar to starch in mature roots are part of the_ tissue system.

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