Question 1

Which of the following ions is MOST likely to be precipitated in alkaline soils?

Accepted Answer

A) hydroxide 
B) bicarbonate 
C) sulfate 
D) iron 
E) potassium 
A) hydroxide 
B) bicarbonate 
C) sulfate 
D) iron 
E) potassium

Question 2

A beneficial element is one that is essential for limited groups of plants.

Accepted Answer

A) True 
 B)False

Question 3

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 4

As dead organic materials are broken down by bacteria and fungi, the nitrogen not used by these organisms is released as ______ in a process called ______.

Accepted Answer

A) NH4+; ammonification 
B) NO3−; nitrification 
C) NO2−; nitrification 
D) N2; denitrification 
E) N2O; denitrification 
A) NH4+; ammonification 
B) NO3−; nitrification 
C) NO2−; nitrification 
D) N2; denitrification 
E) N2O; denitrification

Question 5

Which of the following is NOT an essential element?

Accepted Answer

A) molybdenum 
B) copper 
C) iron 
D) aluminum 
E) chlorine 
A) molybdenum 
B) copper 
C) iron 
D) aluminum 
E) chlorine

Question 6

Which of the following soils can hold the greatest amount of water against the action of gravity?

Accepted Answer

A) silt 
B) loam 
C) coarse sand 
D) fine sand 
E) clay 
A) silt 
B) loam 
C) coarse sand 
D) fine sand 
E) clay

Question 7

The chief reservoir of nitrogen is:

Accepted Answer

A) the soil. 
B) the ocean. 
C) living organisms. 
D) dead organic material. 
E) the atmosphere. 
A) the soil. 
B) the ocean. 
C) living organisms. 
D) dead organic material. 
E) the atmosphere.

Question 8

The permanent wilting percentage is the percentage of:

Accepted Answer

A) colloidal particles remaining in the soil after a heavy rain. 
B) colloidal particles that would cause irreversible wilting. 
C) colloidal particles that would cause reversible wilting. 
D) water remaining in a soil when irreversible wilting occurs. 
E) water remaining in a soil when reversible wilting occurs. 
A) colloidal particles remaining in the soil after a heavy rain. 
B) colloidal particles that would cause irreversible wilting. 
C) colloidal particles that would cause reversible wilting. 
D) water remaining in a soil when irreversible wilting occurs. 
E) water remaining in a soil when reversible wilting occurs.

Question 9

______ is the principal source of nitrogen available to crop plants.

Accepted Answer

A) Organic nitrogen 
B) Nitrate 
C) Ammonium 
D) Glutamine 
E) Glutamate 
A) Organic nitrogen 
B) Nitrate 
C) Ammonium 
D) Glutamine 
E) Glutamate

Question 10

Nickel is an essential element for plant growth.

Accepted Answer

A) True 
 B)False

Question 11

Strategy I for iron mobilization and uptake involves the acidification of the rhizosphere by proton pumps.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

Humus consists mostly of:

Accepted Answer

A) living organic matter. 
B) dead organic matter. 
C) sand. 
D) silt. 
E) clay. 
A) living organic matter. 
B) dead organic matter. 
C) sand. 
D) silt. 
E) clay.

Question 14

A symbiosome consists of:

Accepted Answer

A) bacterioids only. 
B) bacterioids and the surrounding host membrane only. 
C) bacteriods, host membrane, and curled root hair only. 
D) bacteriods, host membrane, and nodule primordium only. 
E) bacteriods, host membrane, cortical cells, and vascular tissues only. 
A) bacterioids only. 
B) bacterioids and the surrounding host membrane only. 
C) bacteriods, host membrane, and curled root hair only. 
D) bacteriods, host membrane, and nodule primordium only. 
E) bacteriods, host membrane, cortical cells, and vascular tissues only.

Question 15

A determinate nodule is different from an indeterminate nodule in that a determinate nodule:

Accepted Answer

A) is elongated. 
B) is cylindrical. 
C) is spherical 
D) has a persistent meristem. 
E) consists of several zones. 
A) is elongated. 
B) is cylindrical. 
C) is spherical 
D) has a persistent meristem. 
E) consists of several zones.

Question 16

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 17

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 18

A bag of fertilizer labeled 20:10:5 contains 20% phosphorus.

Accepted Answer

A) True 
 B)False

Question 19

Cluster roots are usually found in plants that usually form mycorrhizae.

Accepted Answer

A) True 
 B)False

Question 20

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

Exam 29: Plant Nutrition and Soils

Which of the following ions is MOST likely to be precipitated in alkaline soils?

A beneficial element is one that is essential for limited groups of plants.

Which of the following statements about soil is FALSE?

As dead organic materials are broken down by bacteria and fungi, the nitrogen not used by these organisms is released as ______ in a process called ______.

Which of the following is NOT an essential element?

Which of the following soils can hold the greatest amount of water against the action of gravity?

The chief reservoir of nitrogen is:

The permanent wilting percentage is the percentage of:

______ is the principal source of nitrogen available to crop plants.

Nickel is an essential element for plant growth.

Strategy I for iron mobilization and uptake involves the acidification of the rhizosphere by proton pumps.

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

Humus consists mostly of:

A symbiosome consists of:

A determinate nodule is different from an indeterminate nodule in that a determinate nodule:

Which of the following statements about nitrogenase is FALSE?

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

A bag of fertilizer labeled 20:10:5 contains 20% phosphorus.

Cluster roots are usually found in plants that usually form mycorrhizae.

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

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

Filters

As dead organic materials are broken down by bacteria and fungi, the nitrogen not used by these organisms is released as in a process called .