Question 1

Which of the following is NOT a micronutrient?

Accepted Answer

A)  zinc 
B)  copper 
C)  manganese 
D)  calcium 
E)  nickel 
A)  zinc 
B)  copper 
C)  manganese 
D)  calcium 
E)  nickel

Question 2

The role of Nod factors is to:

Accepted Answer

A)  stimulate the formation of infection threads. 
B)  stimulate root-hair curling. 
C)  activate the plant Nod genes. 
D)  activate the bacterial Nod genes. 
E)  activate the plant genes for nodule formation. 
A)  stimulate the formation of infection threads. 
B)  stimulate root-hair curling. 
C)  activate the plant Nod genes. 
D)  activate the bacterial Nod genes. 
E)  activate the plant genes for nodule formation.

Question 3

If a bag of fertilizer is labeled 5-10-6, then you know that the fertilizer contains:

Accepted Answer

A)  5% potassium. 
B)  10% nitrogen. 
C)  6% phosphorus. 
D)  5% nitrogen. 
E)  10% potassium. 
A)  5% potassium. 
B)  10% nitrogen. 
C)  6% phosphorus. 
D)  5% nitrogen. 
E)  10% potassium.

Question 4

Which of the following statements about soil is FALSE?

Accepted Answer

A)  The A horizon has the greatest physical, chemical, and biological activity. 
B)  The A horizon is the topsoil. 
C)  The B horizon is a region of deposition. 
D)  The B horizon is the subsoil. 
E)  The C horizon is part of the true soil. 
A)  The A horizon has the greatest physical, chemical, and biological activity. 
B)  The A horizon is the topsoil. 
C)  The B horizon is a region of deposition. 
D)  The B horizon is the subsoil. 
E)  The C horizon is part of the true soil.

Question 5

Wilted plants in a soil at its permanent wilting percentage will not recover even when placed in a humid chamber.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following statements about leghemoglobin is FALSE?

Accepted Answer

A)  It acts as an O2 carrier. 
B)  It buffers the O2 concentration in nodules. 
C)  It is found in the cytosol of the bacteroid. 
D)  Its heme portion is produced by the bacteroid. 
E)  Its globin portion is produced by the plant. 
A)  It acts as an O2 carrier. 
B)  It buffers the O2 concentration in nodules. 
C)  It is found in the cytosol of the bacteroid. 
D)  Its heme portion is produced by the bacteroid. 
E)  Its globin portion is produced by the plant.

Question 7

Loam soils, the best agricultural soils, contain sand, silt, and clay particles.

Accepted Answer

A) True 
 B)False

Question 8

In desert ecosystems, nitrogen loss from the soil by leaching is negligible.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following statements about nitrogenase is FALSE?

Accepted Answer

A)  It is an enzyme involved in nitrogen fixation. 
B)  It requires O2 as a cofactor. 
C)  It appears to be similar in all organisms. 
D)  It contains molybdenum as one of its prosthetic groups. 
E)  It uses ATP as an energy source. 
A)  It is an enzyme involved in nitrogen fixation. 
B)  It requires O2 as a cofactor. 
C)  It appears to be similar in all organisms. 
D)  It contains molybdenum as one of its prosthetic groups. 
E)  It uses ATP as an energy source.

Question 10

Some nitrogen-fixing symbioses involve plants other than legumes.

Accepted Answer

A) True 
 B)False

Question 11

Synthetase ok? It was "synthatase", but I figured that was wrong.

Accepted Answer

A) True 
 B)False

Question 12

Clay particles have an excess of surface negative charges, and humus has an excess of positive charges.

Accepted Answer

A) True 
 B)False

Question 13

Rhizobia enter legumes by invading the:

Accepted Answer

A)  seeds. 
B)  root hairs. 
C)  stems. 
D)  leaves. 
E)  flowers. 
A)  seeds. 
B)  root hairs. 
C)  stems. 
D)  leaves. 
E)  flowers.

Question 14

A micronutrient is a plant nutrient required in concentrations equal to or less than ______ mg per kg of dry matter.

Accepted Answer

A)  1 
B)  10 
C)  100 
D)  1000 
E)  10,000 
A)  1 
B)  10 
C)  100 
D)  1000 
E)  10,000

Question 15

In magnesium-deficient plants, older leaves become more severely chlorotic than younger leaves because:

Accepted Answer

A)  magnesium is less phloem-mobile than chlorophyll. 
B)  magnesium is more phloem-mobile than chlorophyll. 
C)  younger leaves withdraw magnesium from older leaves. 
D)  older leaves withdraw magnesium from younger leaves. 
E)  magnesium is more mobile in younger leaves than in older leaves. 
A)  magnesium is less phloem-mobile than chlorophyll. 
B)  magnesium is more phloem-mobile than chlorophyll. 
C)  younger leaves withdraw magnesium from older leaves. 
D)  older leaves withdraw magnesium from younger leaves. 
E)  magnesium is more mobile in younger leaves than in older leaves.

Question 16

Extraradical hyphae extend beyond the phosphorus-depletion zone of the root.

Accepted Answer

A) True 
 B)False

Question 17

Nitrosomonas is the bacterium that is primarily responsible for oxidizing ammonia to nitrite.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is(are) a product of denitrification?

Accepted Answer

A)  NH4+ 
B)  NO3− 
C)  NO2− 
D)  N2 
E)  Amino acids 
A)  NH4+ 
B)  NO3− 
C)  NO2− 
D)  N2 
E)  Amino acids

Question 19

Which of the following statements about hyperaccumulators is FALSE?

Accepted Answer

A)  They are plants that are harmed by high concentrations of potentially toxic materials. 
B)  They may concentrate trace elements, radionucleides, and/or heavy metals. 
C)  They are being used in phytoremediation. 
D)  They may concentrate toxins to produce toxic foliage. 
E)  They include alpine penny cress and Arabidopsis halleri. 
A)  They are plants that are harmed by high concentrations of potentially toxic materials. 
B)  They may concentrate trace elements, radionucleides, and/or heavy metals. 
C)  They are being used in phytoremediation. 
D)  They may concentrate toxins to produce toxic foliage. 
E)  They include alpine penny cress and Arabidopsis halleri.

Question 20

Field capacity is the:

Accepted Answer

A)  total amount of water present in a one-hectare field after a soaking rain. 
B)  percentage of water that a soil can hold against the action of gravity. 
C)  percentage of water remaining in a soil when plants undergo irreversible wilting. 
D)  total amount of fertilizer required for maximal plant growth in a one-hectare field. 
E)  total amount of mineral nutrients present in a one-hectare field after a soaking rain. 
A)  total amount of water present in a one-hectare field after a soaking rain. 
B)  percentage of water that a soil can hold against the action of gravity. 
C)  percentage of water remaining in a soil when plants undergo irreversible wilting. 
D)  total amount of fertilizer required for maximal plant growth in a one-hectare field. 
E)  total amount of mineral nutrients present in a one-hectare field after a soaking rain.

Exam 29: Plant Nutrition and Soils

Which of the following is NOT a micronutrient?

The role of Nod factors is to:

If a bag of fertilizer is labeled 5-10-6, then you know that the fertilizer contains:

Which of the following statements about soil is FALSE?

Wilted plants in a soil at its permanent wilting percentage will not recover even when placed in a humid chamber.

Which of the following statements about leghemoglobin is FALSE?

Loam soils, the best agricultural soils, contain sand, silt, and clay particles.

In desert ecosystems, nitrogen loss from the soil by leaching is negligible.

Which of the following statements about nitrogenase is FALSE?

Some nitrogen-fixing symbioses involve plants other than legumes.

Synthetase ok? It was "synthatase", but I figured that was wrong.

Clay particles have an excess of surface negative charges, and humus has an excess of positive charges.

Rhizobia enter legumes by invading the:

A micronutrient is a plant nutrient required in concentrations equal to or less than ______ mg per kg of dry matter.

In magnesium-deficient plants, older leaves become more severely chlorotic than younger leaves because:

Extraradical hyphae extend beyond the phosphorus-depletion zone of the root.

Nitrosomonas is the bacterium that is primarily responsible for oxidizing ammonia to nitrite.

Which of the following is(are) a product of denitrification?

Which of the following statements about hyperaccumulators is FALSE?

Field capacity is the:

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

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