Question 1

Corn requires large amounts of nitrogen fertilizer.As energy costs rise, so do the costs of nitrogen fertilizers and of corn.What is the major reason for this?

Accepted Answer

A)  It costs more to transport the fertilizer. 
B)  It costs more to apply the fertilizer. 
C)  Corn is used to produce high fructose corn syrup. 
D)  More corn is now being used to produce ethanol. 
E)  The Haber process requires a large input of energy. 
A)  It costs more to transport the fertilizer. 
B)  It costs more to apply the fertilizer. 
C)  Corn is used to produce high fructose corn syrup. 
D)  More corn is now being used to produce ethanol. 
E)  The Haber process requires a large input of energy.

Question 2

Because the Casparian strip prevents movement of water and ions directly into the xylem, ions must enter the _______ in order to be transported throughout the plant.

Accepted Answer

The answer of Because the Casparian strip prevents movement of...

Question 3

Nitrogen fixation converts

Accepted Answer

A)  ammonia to N2. 
B)  nitrate to ammonia. 
C)  ammonia to nitrate. 
D)  N2 to ammonia. 
E)  N2 to nitrate. 
A)  ammonia to N2. 
B)  nitrate to ammonia. 
C)  ammonia to nitrate. 
D)  N2 to ammonia. 
E)  N2 to nitrate.

Question 4

Which statement about nitrate reduction is false?

Accepted Answer

A)  All of the nitrogen in an animal was at one time in a plant. 
B)  In leaves, the reduction of nitrate to nitrite occurs in the cytoplasm. 
C)  Animals can reduce nitrate. 
D)  In leaves, the reduction of nitrite to ammonia takes place within chloroplasts. 
E)  Ammonia is incorporated into amino acids in plants. 
A)  All of the nitrogen in an animal was at one time in a plant. 
B)  In leaves, the reduction of nitrate to nitrite occurs in the cytoplasm. 
C)  Animals can reduce nitrate. 
D)  In leaves, the reduction of nitrite to ammonia takes place within chloroplasts. 
E)  Ammonia is incorporated into amino acids in plants.

Question 5

A carnivorous plant that produces one of the fastest motions known among plants is the

Accepted Answer

A)  pitcher plant. 
B)  sundew. 
C)  Venus flytrap. 
D)  butterwort. 
E)  mimosa. 
A)  pitcher plant. 
B)  sundew. 
C)  Venus flytrap. 
D)  butterwort. 
E)  mimosa.

Question 6

Before the widespread use of fertilizers, agricultural land that had become nutrient depleted was allowed to remain _______ for its nutrient levels to recover.

Accepted Answer

A)  forested 
B)  fallow 
C)  dry 
D)  rented 
E)  planted 
A)  forested 
B)  fallow 
C)  dry 
D)  rented 
E)  planted

Question 7

Which is not a reason that plants need sulfur or chlorine?

Accepted Answer

A)  Protein synthesis 
B)  Coenzymes 
C)  Photosynthesis 
D)  Ion balance 
E)  Excretion 
A)  Protein synthesis 
B)  Coenzymes 
C)  Photosynthesis 
D)  Ion balance 
E)  Excretion

Question 8

Refer to the table showing the growth of cassava plants on different soil plots.Each experimental group consisted of the same number of plants on the same acreage of each plot.   What is one possible explanation for the different growth rates among the different plots?

Accepted Answer

It is likely that plots A and B contain

Question 9

Refer to the figure showing two carnivorous plants.   A newly discovered tropical plant has cupped leaves that accumulate water and drowned insects.If the new plant is related to those in the figure, what might it be secreting into the accumulated water?

Accepted Answer

A)  Nitrogen 
B)  Ions 
C)  H+ 
D)  Digestive enzymes 
E)  Carbohydrates 
A)  Nitrogen 
B)  Ions 
C)  H+ 
D)  Digestive enzymes 
E)  Carbohydrates

Question 10

The artificial process of adding CO2 to soil, which also adds H+, aims to

Accepted Answer

A)  increase the availability of anions such as chloride (Cl-) to plants. 
B)  hinder iron uptake. 
C)  increase the pH of the soil. 
D)  increase the availability of potassium cation (K+). 
E)  make the soil more basic. 
A)  increase the availability of anions such as chloride (Cl-) to plants. 
B)  hinder iron uptake. 
C)  increase the pH of the soil. 
D)  increase the availability of potassium cation (K+). 
E)  make the soil more basic.

Question 11

Nitrogen fixation, which is the conversion of atmospheric nitrogen to _______, is catalyzed by a single enzyme called nitrogenase.

Accepted Answer

The answer of Nitrogen fixation, which is the conversion of...

Question 12

_______ are available to the plant in unlimited supply _______.

Accepted Answer

A)  Water and nitrogen; because there is plenty of soil around the plant 
B)  Sulfur and magnesium; because plants need such small amounts from the soil 
C)  Phosphorus and iron; because they dissolve readily in soil water 
D)  Calcium and chlorine; because they are easily absorbed by roots 
E)  Hydrogen and oxygen; as long as sufficient water is available 
A)  Water and nitrogen; because there is plenty of soil around the plant 
B)  Sulfur and magnesium; because plants need such small amounts from the soil 
C)  Phosphorus and iron; because they dissolve readily in soil water 
D)  Calcium and chlorine; because they are easily absorbed by roots 
E)  Hydrogen and oxygen; as long as sufficient water is available

Question 13

Plants acquire their essential mineral nutrients from water and the _______.

Accepted Answer

The answer of Plants acquire their essential mineral nutrients from...

Question 14

Soils are dynamic systems.What changes might result when land is subjected to heavy irrigation for agriculture after being relatively dry for many years? What changes in the soil might result when a virgin deciduous forest is cut down and replaced by crops that are harvested each year?

Accepted Answer

Heavy irrigation after a prolonged dry p

Question 15

If Mg2+ is in low abundance in a soil where a plant is growing, that plant can increase the absorption of Mg2+ by forming _______ to effectively expand its root system.

Accepted Answer

A)  root nodules 
B)  mycorrhizae 
C)  hairy roots 
D)  crown galls 
E)  trichomes 
A)  root nodules 
B)  mycorrhizae 
C)  hairy roots 
D)  crown galls 
E)  trichomes

Question 16

Some mutant Arabidopsis plants that are very bushy (their shoots are more highly branched than wild-type plants) cannot make strigolactones because of a mutation in a gene necessary for strigolactone biosynthesis.If an investigator applies strigolactones to the plants, they grow normally.What does this experiment suggest about the role of strigolactones in plant growth? How does this add to the story of strigolactones as signals for arbuscules and parasitic plants?

Accepted Answer

The experiment with mutant Arabidopsis s

Question 17

Refer to the figure showing two different plant symbioses.   Plant B is most likely experiencing a _______ infection.

Accepted Answer

The answer of Refer to the figure showing two different...

Question 18

What functions do the negative charges found on humus and mineral particles and protons excreted by plants' roots have in the soil?

Accepted Answer

A)  Buffering 
B)  Leaching 
C)  Weathering 
D)  Cation exchange 
E)  Chelation 
A)  Buffering 
B)  Leaching 
C)  Weathering 
D)  Cation exchange 
E)  Chelation

Question 19

Plants derive their carbon from the _______.

Accepted Answer

The answer of Plants derive their carbon from the _______....

Question 20

Plants generally do not thrive in topsoil composed only of clay because such soil tends to

Accepted Answer

A)  create too many air spaces. 
B)  retain too much water. 
C)  hold mineral nutrients too tightly. 
D)  retain too much water and hold minerals too tightly. 
E)  create too many air spaces and retain too much water. 
A)  create too many air spaces. 
B)  retain too much water. 
C)  hold mineral nutrients too tightly. 
D)  retain too much water and hold minerals too tightly. 
E)  create too many air spaces and retain too much water.

Exam 35: Plant Nutrition

Corn requires large amounts of nitrogen fertilizer.As energy costs rise, so do the costs of nitrogen fertilizers and of corn.What is the major reason for this?

Because the Casparian strip prevents movement of water and ions directly into the xylem, ions must enter the _______ in order to be transported throughout the plant.

Nitrogen fixation converts

Which statement about nitrate reduction is false?

A carnivorous plant that produces one of the fastest motions known among plants is the

Before the widespread use of fertilizers, agricultural land that had become nutrient depleted was allowed to remain _______ for its nutrient levels to recover.

Which is not a reason that plants need sulfur or chlorine?

Refer to the table showing the growth of cassava plants on different soil plots.Each experimental group consisted of the same number of plants on the same acreage of each plot. What is one possible explanation for the different growth rates among the different plots?

Refer to the figure showing two carnivorous plants. A newly discovered tropical plant has cupped leaves that accumulate water and drowned insects.If the new plant is related to those in the figure, what might it be secreting into the accumulated water?

The artificial process of adding CO2 to soil, which also adds H+, aims to

Nitrogen fixation, which is the conversion of atmospheric nitrogen to _______, is catalyzed by a single enzyme called nitrogenase.

_______ are available to the plant in unlimited supply _______.

Plants acquire their essential mineral nutrients from water and the _______.

Soils are dynamic systems.What changes might result when land is subjected to heavy irrigation for agriculture after being relatively dry for many years? What changes in the soil might result when a virgin deciduous forest is cut down and replaced by crops that are harvested each year?

If Mg2+ is in low abundance in a soil where a plant is growing, that plant can increase the absorption of Mg2+ by forming _______ to effectively expand its root system.

Refer to the figure showing two different plant symbioses. Plant B is most likely experiencing a _______ infection.

What functions do the negative charges found on humus and mineral particles and protons excreted by plants' roots have in the soil?

Plants derive their carbon from the _______.

Plants generally do not thrive in topsoil composed only of clay because such soil tends to

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

The artificial process of adding CO₂ to soil, which also adds H⁺, aims to

_ are available to the plant in unlimited supply _.

If Mg²⁺ is in low abundance in a soil where a plant is growing, that plant can increase the absorption of Mg²⁺ by forming _______ to effectively expand its root system.