Question 1

Stomates allows carbon dioxide into the leaf and water out of the leaf under normal environmental conditions.

Accepted Answer

A) True 
 B)False  True

Question 2

Stomates do not open when exposed to a narrow band of green light.

Accepted Answer

A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis. 
A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis. D

Question 3

Which is a correct relationship between soil particles and soil characteristics?

Accepted Answer

A) Clay particles hold tight to NO3- and the nitrogen content of clay soils is therefore high. 
B) Clay is unable to retain Ca2+ and K+ which are easily leached away. 
C) Clay holds water and clumps. 
D) Sand prevents water erosion and leaching. 
A) Clay particles hold tight to NO3- and the nitrogen content of clay soils is therefore high. 
B) Clay is unable to retain Ca2+ and K+ which are easily leached away. 
C) Clay holds water and clumps. 
D) Sand prevents water erosion and leaching. C

Question 4

Stomate rhythm in wheat under continuous light at 25$\circ$C.

Accepted Answer

A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis. 
A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis.

Question 5

Essential plant nutrients include carbon,potassium,calcium,and nitrogen.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT one of the three most common elements in plants?

Accepted Answer

A) oxygen 
B) sulfur 
C) carbon 
D) hydrogen 
A) oxygen 
B) sulfur 
C) carbon 
D) hydrogen

Question 7

Which statement is NOT true about water uptake in a plant root?

Accepted Answer

A) Water enters the root from the soil by osmosis. 
B) Water enters the cytoplasm of the root hairs by active transport. 
C) Water travels by diffusion through the cell walls of the epidermis and cortex. 
D) Water must enter the cytoplasm of the endodermal cells to get past the Casparian strip. 
A) Water enters the root from the soil by osmosis. 
B) Water enters the cytoplasm of the root hairs by active transport. 
C) Water travels by diffusion through the cell walls of the epidermis and cortex. 
D) Water must enter the cytoplasm of the endodermal cells to get past the Casparian strip.

Question 8

The early experiment by Van Helmont (1600s)describes how he grew a tree in a large pot and found that after five years,the amount of soil in the pot had not changed.He concluded that the increase in weight was due to the addition of water.At that time,the compounds in air had not yet been identified.Today,you know that he only discovered half the story.Which additional experiment would provide evidence for the rest of the story?

Accepted Answer

A) Carbon is discovered as a major element in trees and is lacking in water molecules. 
B) Radioactive carbon in carbon dioxide in the air is identified as part of the tree structure. 
C) A very careful measurement of the water taken in and lost by the tree would have revealed only half the added weight gained by the tree was from water. 
D) Analysis of nutrients in the soil would account for half the weight of the tree. 
E) All of the experiments but for an analysis of nutrients in the soil would account for half the weight of the tree. 
A) Carbon is discovered as a major element in trees and is lacking in water molecules. 
B) Radioactive carbon in carbon dioxide in the air is identified as part of the tree structure. 
C) A very careful measurement of the water taken in and lost by the tree would have revealed only half the added weight gained by the tree was from water. 
D) Analysis of nutrients in the soil would account for half the weight of the tree. 
E) All of the experiments but for an analysis of nutrients in the soil would account for half the weight of the tree.

Question 9

To secure genuine maple syrup,maple tree trunks are "tapped" with metal spigots that interrupt the flow of sap in late winter prior to spring budding.Which of the following would be true of this process?

Accepted Answer

A) Leaves are the ultimate origin of the sucrose component. 
B) The sap flows out with some pressure from the phloem tube. 
C) The water component originated from soil water absorbed by root hairs. 
D) Only a small core is tapped; taking sap continuously from a substantial radius could eventually kill part of the tree. 
E) All of the choices are correct. 
A) Leaves are the ultimate origin of the sucrose component. 
B) The sap flows out with some pressure from the phloem tube. 
C) The water component originated from soil water absorbed by root hairs. 
D) Only a small core is tapped; taking sap continuously from a substantial radius could eventually kill part of the tree. 
E) All of the choices are correct.

Question 10

Which type of soil will supply nutrients to plants while its acidity leaches minerals from rock?

Accepted Answer

A) humus 
B) clay 
C) sand 
D) loam 
A) humus 
B) clay 
C) sand 
D) loam

Question 11

Water moves into the guard cells in response to the movement of K+ into the guard cells.

Accepted Answer

A) True 
 B)False

Question 12

Air with varying amounts of CO2,within the ranges found in nature,is forced across leaf surfaces and into sub-stomatal cavities; this produces stomatal closure.

Accepted Answer

A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis. 
A) Supports both Hypothesis I and II. 
B) Supports only Hypothesis I. 
C) Supports only Hypothesis II. 
D) Supports neither hypothesis.

Question 13

Analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet.

Accepted Answer

A) True 
 B)False

Question 14

How did the scientist Marcello Malpighi,in 1679,discover the role of phloem?

Accepted Answer

A) He observed aphids and cut off their beaks. 
B) He was an early researcher on the cause of maple sap flow in producing syrup. 
C) He observed the effects of girdling a tree below the level of the majority of leaves. 
D) He used radioactive tracers to measure the flow of sap between two distances over time. 
E) He observed the uptake of ink into the stem of celery. 
A) He observed aphids and cut off their beaks. 
B) He was an early researcher on the cause of maple sap flow in producing syrup. 
C) He observed the effects of girdling a tree below the level of the majority of leaves. 
D) He used radioactive tracers to measure the flow of sap between two distances over time. 
E) He observed the uptake of ink into the stem of celery.

Question 15

Which force is responsible for moving water up to the tops of the trees?

Accepted Answer

A) water stress 
B) atmospheric pressure 
C) root pressure 
D) guttation 
E) transpiration 
A) water stress 
B) atmospheric pressure 
C) root pressure 
D) guttation 
E) transpiration

Question 16

Which statement is NOT true about the pressure-flow model of phloem transport?

Accepted Answer

A) Water is actively transported into phloem. 
B) Phloem sap moves at a rate of 60 to 300 cm per hour. 
C) Pressure is created in the phloem by the buildup of water and sugar. 
D) Sugar produced by photosynthesis is actively transported into phloem cells. 
E) Sugar is actively transported out of the phloem at a sink area such as the root. 
A) Water is actively transported into phloem. 
B) Phloem sap moves at a rate of 60 to 300 cm per hour. 
C) Pressure is created in the phloem by the buildup of water and sugar. 
D) Sugar produced by photosynthesis is actively transported into phloem cells. 
E) Sugar is actively transported out of the phloem at a sink area such as the root.

Question 17

Sieve tube members are connected by

Accepted Answer

A) plasmodesmata. 
B) tight junctions. 
C) companion cells. 
D) tracheids. 
A) plasmodesmata. 
B) tight junctions. 
C) companion cells. 
D) tracheids.

Question 18

Water is forced to enter root endodermal cells by a strip of suberin in the four sides of root endodermal cells called the Casparian strip.

Accepted Answer

A) True 
 B)False

Question 19

Soil formation is due to

Accepted Answer

A) decomposition of organic matter. 
B) mechanical weathering of bedrock. 
C) chemical weathering of rock. 
D) All of the choices are correct. 
A) decomposition of organic matter. 
B) mechanical weathering of bedrock. 
C) chemical weathering of rock. 
D) All of the choices are correct.

Question 20

Select the correct sequence for mineral uptake in plants. 
A.The root cells will initially uptake the minerals.
B.The upwards movement of water will carry the minerals towards the leaves.
C.Some of the minerals are deposited in the leaf cells.
D.The minerals move into the xylem of the vascular tissue.
E.Some of the minerals leave the xylem and enter the various tissues that require them.

Accepted Answer

A) a - d - b - e - c 
B) a - b - d - e - c 
C) c- a - d - b - e 
D) d - b - e - a - c 
E) d - b - c - a - e 
A) a - d - b - e - c 
B) a - b - d - e - c 
C) c- a - d - b - e 
D) d - b - e - a - c 
E) d - b - c - a - e

Exam 25: Flowering Plants: Nutrition and Transport

Stomates allows carbon dioxide into the leaf and water out of the leaf under normal environmental conditions.

Stomates do not open when exposed to a narrow band of green light.

Which is a correct relationship between soil particles and soil characteristics?

Stomate rhythm in wheat under continuous light at 25 ∘\circ∘ C.

Essential plant nutrients include carbon,potassium,calcium,and nitrogen.

Which of the following is NOT one of the three most common elements in plants?

Which statement is NOT true about water uptake in a plant root?

To secure genuine maple syrup,maple tree trunks are "tapped" with metal spigots that interrupt the flow of sap in late winter prior to spring budding.Which of the following would be true of this process?

Which type of soil will supply nutrients to plants while its acidity leaches minerals from rock?

Water moves into the guard cells in response to the movement of K+ into the guard cells.

Air with varying amounts of CO2,within the ranges found in nature,is forced across leaf surfaces and into sub-stomatal cavities; this produces stomatal closure.

Analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet.

How did the scientist Marcello Malpighi,in 1679,discover the role of phloem?

Which force is responsible for moving water up to the tops of the trees?

Which statement is NOT true about the pressure-flow model of phloem transport?

Sieve tube members are connected by

Water is forced to enter root endodermal cells by a strip of suberin in the four sides of root endodermal cells called the Casparian strip.

Soil formation is due to

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

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Metabolism: Energy and Enzymes

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Cellular Respiration

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Origin and History of Life

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Flowering Plants: Structure and Organization

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

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Stomate rhythm in wheat under continuous light at 25^$\circ$C. $Stomate rhythm in wheat under continuous light at 25<sup> \circ </sup>C.$

Water moves into the guard cells in response to the movement of K⁺ into the guard cells.

Air with varying amounts of CO₂,within the ranges found in nature,is forced across leaf surfaces and into sub-stomatal cavities; this produces stomatal closure.