Question 1

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.E) None of the above
F) C) and D)

Question 2

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.F) B) and C)
G) A) and B) E

Question 3

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Accepted Answer

A)   nucleic acids.
B)   protein.
C)   chlorophyll.
D)   All of these are correct.
E)   DNA.F) C) and E)
G) A) and E)

Question 4

Soil consists of

Accepted Answer

A)   a mixture of soil particles of different sizes.
B)   both living organisms and decaying organic material.
C)   air and water.
D)   All of these are components that define soil.E) None of the above
F) A) and C)

Question 5

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

Accepted Answer

A)   oxygen
B)   sulfur
C)   carbon
D)   hydrogenE) A) and C)
F) B) and C) B

Question 6

Which statement is NOT true about root adaptations in plants?

Accepted Answer

A)   Some plants have very poorly developed roots or none at all.
B)   Fungal mycorrhizae depend on plants for the fungus's supply of water and minerals.
C)   Some plants, including orchids, require the presence of fungal symbionts to survive.
D)   Parasitic plants have root adaptations called haustoria that draw nutrients from the host.
E)   Bacteria of the genus Rhizobium live in root nodules in legumes, producing available nitrogen that the plant uses.F) A) and C)
G) None of the above

Question 7

The degree of erosion in the United States is best described by the following statement.

Accepted Answer

A)   There is a set amount of soil that was originally formed and erosion continually removes some of it; therefore we will one day run out of topsoil due to erosion.
B)   Soil forms at generally the same rate as soil erodes, so there is an overall balance just as worldwide precipitation equals evaporation; it is just not evenly spread across the landscape.
C)   Soil is eroding faster than it is being formed on about one-third of all cropland.
D)   Removal of trees helps build up topsoil and prevents erosion.E) B) and C)
F) A) and D)

Question 8

What is the main factor that will determine whether or not water can enter the root cells?

Accepted Answer

A)   A lower osmotic pressure in the root tissues than the soil solution
B)   Type of plant cells that are exposed to the water
C)   Volume of water available
D)   A higher osmotic pressure in the root tissues than the soil solutionE) None of the above
F) A) and D)

Question 9

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.F) C) and D)
G) B) and D)

Question 10

List the steps associated with the pressure-flow model of phloem transport.

Accepted Answer

1. Sugars are produced in the source (le...

Question 11

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century. What factors are involved in the erosion of soil?

Accepted Answer

A)   deforestation
B)   desertization
C)   poor farming practices
D)   All of these factors cause erosion.E) B) and D)
F) None of the above

Question 12

Stomata rhythm in wheat under continuous light at 25  °\degree° C.

Accepted Answer

A)   Supports both Hypothesis I and II.
B)   Supports only Hypothesis I.
C)   Supports only Hypothesis II.
D)   Supports neither hypothesis. E) B) and D)
F) None of the above

Question 13

In the pressure-flow model of phloem transport, the sink is normally

Accepted Answer

A)   the stem.
B)   the roots.
C)   xylem.
D)   lenticels.E) A) and B)
F) None of the above

Question 14

Phytoremediation is the use of a plants ability to uptake minerals in order to remove pollutants from the environment.

Accepted Answer

A) True 
 B)False

Question 15

Within a mycorrhizal relationship the fungi provide a greater surface area for mineral and water loss while the plant furnishes the fungi with sugars and amino acids.

Accepted Answer

A) True 
 B)False

Question 16

Researchers discover that guard cells of the lady slipper orchid lack chloroplasts; yet the guard cells regularly open and close.

Accepted Answer

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

Question 17

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.E) C) and D)
F) A) and C)

Question 18

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.E) A) and B)
F) All of the above

Question 19

Which term describes the forcing out of water at the surface of a plant's leaves?

Accepted Answer

A)   water stress
B)   atmospheric pressure
C)   root pressure
D)   guttation
E)   transpirationF) None of the above
G) A) and D)

Question 20

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.F) A) and E)
G) A) and D) E

Exam 25: Flowering Plants: Nutrition and Transport

Soil formation is due to

Correct Answer
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Correct Answer
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E

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Correct Answer
verified

Soil consists of

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

Correct Answer
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B

Which statement is NOT true about root adaptations in plants?

Correct Answer
verified

The degree of erosion in the United States is best described by the following statement.

Correct Answer
verified

What is the main factor that will determine whether or not water can enter the root cells?

Correct Answer
verified

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

Correct Answer
verified

List the steps associated with the pressure-flow model of phloem transport.

Correct Answer
verified
1. Sugars are produced in the source (le...
View Answer

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century. What factors are involved in the erosion of soil?

Correct Answer
verified

Stomata rhythm in wheat under continuous light at 25 $\degree$ C. $Stomata rhythm in wheat under continuous light at 25 \degree C. A) Supports both Hypothesis I and II. B) Supports only Hypothesis I. C) Supports only Hypothesis II. D) Supports neither hypothesis.$

Correct Answer
verified

In the pressure-flow model of phloem transport, the sink is normally

Correct Answer
verified

Phytoremediation is the use of a plants ability to uptake minerals in order to remove pollutants from the environment.

Correct Answer
verified

Within a mycorrhizal relationship the fungi provide a greater surface area for mineral and water loss while the plant furnishes the fungi with sugars and amino acids.

Correct Answer
verified

Researchers discover that guard cells of the lady slipper orchid lack chloroplasts; yet the guard cells regularly open and close.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which term describes the forcing out of water at the surface of a plant's leaves?

Correct Answer
verified

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?

Correct Answer
verified
E

Exam 25: Flowering Plants: Nutrition and Transport

Soil formation is due to

Correct AnswerverifiedShow Answer

Correct AnswerverifiedE

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Correct AnswerverifiedShow Answer

Soil consists of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

Which statement is NOT true about root adaptations in plants?

Correct AnswerverifiedShow Answer

The degree of erosion in the United States is best described by the following statement.

Correct AnswerverifiedShow Answer

What is the main factor that will determine whether or not water can enter the root cells?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

List the steps associated with the pressure-flow model of phloem transport.

Correct Answerverified1. Sugars are produced in the source (le...View AnswerShow Answer

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century. What factors are involved in the erosion of soil?

Correct AnswerverifiedShow Answer

Stomata rhythm in wheat under continuous light at 25 °\degree° C.

Correct AnswerverifiedShow Answer

In the pressure-flow model of phloem transport, the sink is normally

Correct AnswerverifiedShow Answer

Phytoremediation is the use of a plants ability to uptake minerals in order to remove pollutants from the environment.

Correct AnswerverifiedShow Answer

Within a mycorrhizal relationship the fungi provide a greater surface area for mineral and water loss while the plant furnishes the fungi with sugars and amino acids.

Correct AnswerverifiedShow Answer

Researchers discover that guard cells of the lady slipper orchid lack chloroplasts; yet the guard cells regularly open and close.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which term describes the forcing out of water at the surface of a plant's leaves?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedE

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E

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B

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1. Sugars are produced in the source (le...
View Answer

Correct Answer
verified

Stomata rhythm in wheat under continuous light at 25 $\degree$ C. $Stomata rhythm in wheat under continuous light at 25 \degree C. A) Supports both Hypothesis I and II. B) Supports only Hypothesis I. C) Supports only Hypothesis II. D) Supports neither hypothesis.$

Correct Answer
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E