Question 1

In the process of nitrogen assimilation, ____ is converted to ____, which is then rapidly used to synthesize organic molecules.

Accepted Answer

A)  NH4+; NO3- 
B)  N2; NO3- 
C)  NO3-; NH4+ 
D)  NH3; NH4+ 
E)  NO3-; N2 
A)  NH4+; NO3- 
B)  N2; NO3- 
C)  NO3-; NH4+ 
D)  NH3; NH4+ 
E)  NO3-; N2

Question 2

Why might a soil that has a sufficient concentration of a mineral element-for example, calcium-not have sufficient availability of the element to maximize plant growth rates?

Accepted Answer

Chemical reactions in soils are dependen

Question 3

The enzyme nitrogenase is irreversibly inhibited by low concentrations of ____.

Accepted Answer

A)  O2 
B)  NO3- 
C)  N2 
D)  CO2 
E)  NH4+ 
A)  O2 
B)  NO3- 
C)  N2 
D)  CO2 
E)  NH4+

Question 4

The enzyme nitrogenase is most directly involved in the process called ____.

Accepted Answer

A)  nitrification 
B)  ammonification 
C)  nitrogen cycling 
D)  nitrogen fixation 
E)  nitrogen assimilation 
A)  nitrification 
B)  ammonification 
C)  nitrogen cycling 
D)  nitrogen fixation 
E)  nitrogen assimilation

Question 5

The nutrients that a plant needs for normal growth and development are acquired through the ____.

Accepted Answer

A)  Sun 
B)  rain 
C)  leaves 
D)  roots 
E)  bark 
A)  Sun 
B)  rain 
C)  leaves 
D)  roots 
E)  bark

Question 6

Scientists are attempting to genetically modify rice so that it will not incorporate ____ into the grains.

Accepted Answer

A)  arsenic 
B)  methylmercury 
C)  chelated iron 
D)  lead 
E)  uranium hexafluoride 
A)  arsenic 
B)  methylmercury 
C)  chelated iron 
D)  lead 
E)  uranium hexafluoride

Question 7

Plants are able to generate all of the substances they need for their metabolism using energy from the ____.

Accepted Answer

A)  soil 
B)  air 
C)  root 
D)  Sun 
E)  rain 
A)  soil 
B)  air 
C)  root 
D)  Sun 
E)  rain

Question 8

Hydroponic culture is the process of ____.

Accepted Answer

A)  growing plants in pure water mixed with carefully measured amounts of specific minerals 
B)  irrigation of dry areas to improve mineral absorption by plants 
C)  growing plants in ponds and lakes to improve their access to water, allowing the plants to place more resources into the shoot system 
D)  irrigation of dry areas to prevent crop plants from wilting 
E)  growing plants with specific hydrocarbons added to the soil to test the effect on plant growth 
A)  growing plants in pure water mixed with carefully measured amounts of specific minerals 
B)  irrigation of dry areas to improve mineral absorption by plants 
C)  growing plants in ponds and lakes to improve their access to water, allowing the plants to place more resources into the shoot system 
D)  irrigation of dry areas to prevent crop plants from wilting 
E)  growing plants with specific hydrocarbons added to the soil to test the effect on plant growth

Question 9

Roots obtain cations through cation exchange, where soil particles absorb ____ provided directly or indirectly by the root, and thus release cations.

Accepted Answer

A)  Cl- 
B)  K+ 
C)  H+ 
D)  water 
E)  CO2 
A)  Cl- 
B)  K+ 
C)  H+ 
D)  water 
E)  CO2

Question 10

Most plants absorb nitrogen in the form of ____.

Accepted Answer

A)  NH4+ 
B)  CN 
C)  N2 
D)  NH3 
E)  NO3- 
A)  NH4+ 
B)  CN 
C)  N2 
D)  NH3 
E)  NO3-

Question 11

Which element is considered an essential macronutrient for plants?

Accepted Answer

A)  oxygen 
B)  boron 
C)  lithium 
D)  silicon 
E)  molybdenum 
A)  oxygen 
B)  boron 
C)  lithium 
D)  silicon 
E)  molybdenum

Question 12

The A horizon contains little, if any, organic matter.

Accepted Answer

A) True 
 B)False

Question 13

Legumes grown in sterile soil would be expected to have ____.

Accepted Answer

A)  purplish veins 
B)  chlorosis and mottled or bronzed leaves 
C)  chlorosis in older leaves and stunted growth 
D)  burned leaf edges and curled, mottled, or spotted older leaves 
E)  pale green, rolled, or cupped leaves 
A)  purplish veins 
B)  chlorosis and mottled or bronzed leaves 
C)  chlorosis in older leaves and stunted growth 
D)  burned leaf edges and curled, mottled, or spotted older leaves 
E)  pale green, rolled, or cupped leaves

Question 14

Which substance is not released by plant roots to enable and improve access to particular nutrients in the soil?

Accepted Answer

A)  amino acids 
B)  carbohydrates 
C)  enzymes 
D)  fatty acids 
E)  carbon dioxide 
A)  amino acids 
B)  carbohydrates 
C)  enzymes 
D)  fatty acids 
E)  carbon dioxide

Question 15

Chlorosis is a condition that results in yellowed plant tissues.

Accepted Answer

A) True 
 B)False

Question 16

Soil mineral particles that are less than 0.002 mm in diameter are called ____.

Accepted Answer

A)  sand 
B)  humus 
C)  clay 
D)  silt 
E)  microparticles 
A)  sand 
B)  humus 
C)  clay 
D)  silt 
E)  microparticles

Question 17

What soil component is most important for retaining water in soil for use by plants?

Accepted Answer

A)  sand 
B)  humus 
C)  clay 
D)  silt 
E)  rock 
A)  sand 
B)  humus 
C)  clay 
D)  silt 
E)  rock

Question 18

The process of adding hydrogen to N2, creating NH3and eventually NH4+, and which requires a substantial input of ATP, is called ____.

Accepted Answer

A)  nitrification 
B)  ammonification 
C)  nitrogen cycling 
D)  nitrogen fixation 
E)  nitrogen assimilation 
A)  nitrification 
B)  ammonification 
C)  nitrogen cycling 
D)  nitrogen fixation 
E)  nitrogen assimilation

Question 19

What deficiency symptom is common among plants with inadequate levels of nitrogen, magnesium, iron, zinc, or copper? What characteristics would be seen in the plants' leaves?

Accepted Answer

Chlorosis is a symptom in plan

Question 20

Studies of a soybean plant ( Glycine max ) and the bacterium Bradyrhizobium japonicum have shown that the tip of a root hair curls toward the bacterium in response to ____.

Accepted Answer

A)  a flavonoid released by soybean roots 
B)  nod gene products produced by soybean roots 
C)  nod gene products produced by the bacterium 
D)  nitrogen fixation by the bacterium 
E)  a flavonoid produced by the bacterium 
A)  a flavonoid released by soybean roots 
B)  nod gene products produced by soybean roots 
C)  nod gene products produced by the bacterium 
D)  nitrogen fixation by the bacterium 
E)  a flavonoid produced by the bacterium

Exam 35: Plant Nutrition

In the process of nitrogen assimilation, ____ is converted to ____, which is then rapidly used to synthesize organic molecules.

Why might a soil that has a sufficient concentration of a mineral element-for example, calcium-not have sufficient availability of the element to maximize plant growth rates?

The enzyme nitrogenase is irreversibly inhibited by low concentrations of ____.

The enzyme nitrogenase is most directly involved in the process called ____.

The nutrients that a plant needs for normal growth and development are acquired through the ____.

Scientists are attempting to genetically modify rice so that it will not incorporate ____ into the grains.

Plants are able to generate all of the substances they need for their metabolism using energy from the ____.

Hydroponic culture is the process of ____.

Roots obtain cations through cation exchange, where soil particles absorb ____ provided directly or indirectly by the root, and thus release cations.

Most plants absorb nitrogen in the form of ____.

Which element is considered an essential macronutrient for plants?

The A horizon contains little, if any, organic matter.

Legumes grown in sterile soil would be expected to have ____.

Which substance is not released by plant roots to enable and improve access to particular nutrients in the soil?

Chlorosis is a condition that results in yellowed plant tissues.

Soil mineral particles that are less than 0.002 mm in diameter are called ____.

What soil component is most important for retaining water in soil for use by plants?

The process of adding hydrogen to N2, creating NH3and eventually NH4+, and which requires a substantial input of ATP, is called ____.

What deficiency symptom is common among plants with inadequate levels of nitrogen, magnesium, iron, zinc, or copper? What characteristics would be seen in the plants' leaves?

Studies of a soybean plant ( Glycine max ) and the bacterium Bradyrhizobium japonicum have shown that the tip of a root hair curls toward the bacterium in response to ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

In the process of nitrogen assimilation, is converted to , which is then rapidly used to synthesize organic molecules.

The process of adding hydrogen to N₂, creating NH₃and eventually NH₄⁺, and which requires a substantial input of ATP, is called ____.