Question 1

If an African violet has chlorosis, which of the following elements might be a useful addition to the soil?

Accepted Answer

A)  molybdenum 
B)  copper 
C)  iodine 
D)  magnesium 
A)  molybdenum 
B)  copper 
C)  iodine 
D)  magnesium

Question 2

Which elements are most often the limiting nutrients for plant growth?

Accepted Answer

A)  nitrogen, potassium, phosphorus 
B)  nitrogen, oxygen, hydrogen 
C)  carbon, sodium, chlorine 
D)  carbon, nitrogen, oxygen 
A)  nitrogen, potassium, phosphorus 
B)  nitrogen, oxygen, hydrogen 
C)  carbon, sodium, chlorine 
D)  carbon, nitrogen, oxygen

Question 3

Micronutrients are needed in very small amounts because

Accepted Answer

A)  most of them are mobile in the plant. 
B)  most serve mainly as cofactors of enzymes. 
C)  most are supplied in large enough quantities in seeds. 
D)  they play only a minor role in the growth and health of the plant. 
A)  most of them are mobile in the plant. 
B)  most serve mainly as cofactors of enzymes. 
C)  most are supplied in large enough quantities in seeds. 
D)  they play only a minor role in the growth and health of the plant.

Question 4

Roots acidify the soil solution by releasing ________ and pumping ________ into the soil.

Accepted Answer

A)  CO₂; K⁺ 
B)  CO₂; H⁺ 
C)  CO₂; Na⁺ 
D)  N; Na⁺ 
A)  CO₂; K⁺ 
B)  CO₂; H⁺ 
C)  CO₂; Na⁺ 
D)  N; Na⁺

Question 5

Which one of the following micronutrients plays a critical role as a component of chlorophyll?

Accepted Answer

A)  nickel 
B)  iron 
C)  magnesium 
D)  molybdenum 
A)  nickel 
B)  iron 
C)  magnesium 
D)  molybdenum

Question 6

A group of ten tomato plants are germinated and maintained in a large tray with no drainage. After several weeks they all begin to wilt and die despite repeated watering and fertilization. The most likely cause of this die-off is ________.

Accepted Answer

A)  competition for resources 
B)  a lack of oxygen for the roots 
C)  organic nutrient depletion 
D)  no room left for root growth 
A)  competition for resources 
B)  a lack of oxygen for the roots 
C)  organic nutrient depletion 
D)  no room left for root growth

Question 7

The NPK percentages on a package of fertilizer refer to the ________.

Accepted Answer

A)  percentages of manure collected from different types of animals 
B)  relative percentages of organic and inorganic nutrients in the fertilizer 
C)  percentages of three important mineral nutrients 
D)  proportions of three different nitrogen sources 
A)  percentages of manure collected from different types of animals 
B)  relative percentages of organic and inorganic nutrients in the fertilizer 
C)  percentages of three important mineral nutrients 
D)  proportions of three different nitrogen sources

Question 8

The earliest vascular plants on land had underground stems (rhizomes), but no roots. Water and mineral nutrients were most likely obtained by ________.

Accepted Answer

A)  diffusion through stomata 
B)  absorption by mycorrhizae 
C)  osmosis through the root hairs 
D)  diffusion across the cuticle of the rhizome 
A)  diffusion through stomata 
B)  absorption by mycorrhizae 
C)  osmosis through the root hairs 
D)  diffusion across the cuticle of the rhizome

Question 9

Why is nitrogen fixation an essential process?

Accepted Answer

A)  Nitrogen fixation can only be done by certain prokaryotes. 
B)  Fixed nitrogen is often the limiting factor in plant growth. 
C)  Nitrogen fixation is very expensive in terms of metabolic energy. 
D)  Nitrogen fixers are sometimes symbiotic with legumes. 
A)  Nitrogen fixation can only be done by certain prokaryotes. 
B)  Fixed nitrogen is often the limiting factor in plant growth. 
C)  Nitrogen fixation is very expensive in terms of metabolic energy. 
D)  Nitrogen fixers are sometimes symbiotic with legumes.

Question 10

Which of the following plants is classified as an epiphyte?

Accepted Answer

A)  Venus flytrap 
B)  pitcher plant 
C)  staghorn fern 
D)  mistletoe 
A)  Venus flytrap 
B)  pitcher plant 
C)  staghorn fern 
D)  mistletoe

Question 11

Carnivorous plants have evolved mechanisms that trap and digest small animals. The products of this digestion are used to supplement the plant's supply of ________.

Accepted Answer

A)  energy 
B)  carbohydrates 
C)  lipids and steroids 
D)  nitrogen and other minerals 
A)  energy 
B)  carbohydrates 
C)  lipids and steroids 
D)  nitrogen and other minerals

Question 12

The inorganic nutrient most often lacking in crops is

Accepted Answer

A)  carbon. 
B)  nitrogen. 
C)  phosphorus. 
D)  potassium. 
A)  carbon. 
B)  nitrogen. 
C)  phosphorus. 
D)  potassium.

Exam 37: Soil and Plant Nutrition

If an African violet has chlorosis, which of the following elements might be a useful addition to the soil?

Which elements are most often the limiting nutrients for plant growth?

Micronutrients are needed in very small amounts because

Roots acidify the soil solution by releasing ________ and pumping ________ into the soil.

Which one of the following micronutrients plays a critical role as a component of chlorophyll?

A group of ten tomato plants are germinated and maintained in a large tray with no drainage. After several weeks they all begin to wilt and die despite repeated watering and fertilization. The most likely cause of this die-off is ________.

The NPK percentages on a package of fertilizer refer to the ________.

The earliest vascular plants on land had underground stems (rhizomes), but no roots. Water and mineral nutrients were most likely obtained by ________.

Why is nitrogen fixation an essential process?

Which of the following plants is classified as an epiphyte?

Carnivorous plants have evolved mechanisms that trap and digest small animals. The products of this digestion are used to supplement the plant's supply of ________.

The inorganic nutrient most often lacking in crops is

Evolution, the Themes of Biology, and Scientific Inquiry

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Vascular Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

Filters

Roots acidify the soil solution by releasing and pumping into the soil.