Question 1

Root nodules fix nitrogen, but mycorrhizae help plants _______ chemical elements.

Accepted Answer

The answer of Root nodules fix nitrogen, but mycorrhizae help...

Question 2

If a detector shows a large amount of nitrogen gas being produced by a patch of soil, that patch of soil must contain

Accepted Answer

A)  denitrifiers. 
B)  rhizobia. 
C)  flowering plants. 
D)  decomposers. 
E)  nitrifiers. 
A)  denitrifiers. 
B)  rhizobia. 
C)  flowering plants. 
D)  decomposers. 
E)  nitrifiers.

Question 3

In crop-rotation designs, why are soybeans, a type of legume, often planted in fields where corn was grown the year before?

Accepted Answer

A)  They carry out C3 photosynthesis and corn carries out C4 photosynthesis. 
B)  They need less light. 
C)  They add reduced nitrogen to the soil. 
D)  They produce seeds rich in oils. 
E)  They can produce reduced sulfur compounds. 
A)  They carry out C3 photosynthesis and corn carries out C4 photosynthesis. 
B)  They need less light. 
C)  They add reduced nitrogen to the soil. 
D)  They produce seeds rich in oils. 
E)  They can produce reduced sulfur compounds.

Question 4

If a plant forms an infection thread in one of its root hairs, it is preparing to form a

Accepted Answer

A)  leaf. 
B)  tuber. 
C)  root nodule. 
D)  storage root. 
E)  bulb. 
A)  leaf. 
B)  tuber. 
C)  root nodule. 
D)  storage root. 
E)  bulb.

Question 5

Refer to the table.Researchers grew seedlings with phosphate fertilizer, arbuscular mycorrhizae, or both, and then weighed the seedlings after six months.   Which explanation best describes why the weight of the seedlings did not increase when the amount of phosphate was doubled in the absence of mycorrhizae?

Accepted Answer

A)  The amount of phosphate added was over and above the absorptive capacity of the plant roots. 
B)  Without mycorrhizae, no phosphate was available for uptake by the roots. 
C)  The additional phosphate is converted to unusable form in the soil. 
D)  Other plants compete for the added phosphate at higher concentrations. 
E)  There was experimental error in that plot of plants. 
A)  The amount of phosphate added was over and above the absorptive capacity of the plant roots. 
B)  Without mycorrhizae, no phosphate was available for uptake by the roots. 
C)  The additional phosphate is converted to unusable form in the soil. 
D)  Other plants compete for the added phosphate at higher concentrations. 
E)  There was experimental error in that plot of plants.

Question 6

All nitrogen fixation is carried out by _______, some of which live in symbiosis with other organisms.

Accepted Answer

The answer of All nitrogen fixation is carried out by...

Question 7

The large Rhizobium cells that live within plant root nodules are called _______.

Accepted Answer

The answer of The large Rhizobium cells that live within...

Question 8

Carnivorous plants are still considered to be _______ because they acquire energy from photosynthesis.

Accepted Answer

The answer of Carnivorous plants are still considered to be...

Question 9

A newly discovered parasitic plant is found to have special threadlike leaves that penetrate the stems of the plants from which it steals nutrients.These leaves, therefore, have some of the same properties as

Accepted Answer

A)  mycorrhizae. 
B)  haustoria. 
C)  nodules. 
D)  both mycorrhizae and haustoria. 
E)  both mycorrhizae and nodules. 
A)  mycorrhizae. 
B)  haustoria. 
C)  nodules. 
D)  both mycorrhizae and haustoria. 
E)  both mycorrhizae and nodules.

Question 10

In almost all land plants, roots get most of their oxygen from

Accepted Answer

A)  air spaces in the soil. 
B)  water in the soil. 
C)  the leaves, by way of the phloem. 
D)  the leaves, which get oxygen from the air. 
E)  specific transport by symbionts. 
A)  air spaces in the soil. 
B)  water in the soil. 
C)  the leaves, by way of the phloem. 
D)  the leaves, which get oxygen from the air. 
E)  specific transport by symbionts.

Question 11

Which three elements are most commonly added to agricultural soils as fertilizers?

Accepted Answer

A)  Nitrogen, phosphorus, and iron 
B)  Nitrogen, potassium, and magnesium 
C)  Potassium, sulfur, and iron 
D)  Nitrogen, potassium, and phosphorus 
E)  Nitrogen, sulfur, and calcium 
A)  Nitrogen, phosphorus, and iron 
B)  Nitrogen, potassium, and magnesium 
C)  Potassium, sulfur, and iron 
D)  Nitrogen, potassium, and phosphorus 
E)  Nitrogen, sulfur, and calcium

Question 12

Carnivorous plants trap insects for

Accepted Answer

A)  energy. 
B)  carbon. 
C)  improved mineral nutrition. 
D)  reduced herbivorous damage. 
E)  carbon dioxide. 
A)  energy. 
B)  carbon. 
C)  improved mineral nutrition. 
D)  reduced herbivorous damage. 
E)  carbon dioxide.

Question 13

To attract rhizobial bacteria, plants from the bean family secrete what compounds into the soil?

Accepted Answer

A)  Flavonoids 
B)  Nucleic acids 
C)  Lycopene 
D)  Protons 
E)  Oleic acids 
A)  Flavonoids 
B)  Nucleic acids 
C)  Lycopene 
D)  Protons 
E)  Oleic acids

Question 14

Which molecule is not involved in the process of nitrogen fixation?

Accepted Answer

A)  Nitrogenase 
B)  ATP 
C)  Hydrogen 
D)  Nitrite 
E)  Ammonia 
A)  Nitrogenase 
B)  ATP 
C)  Hydrogen 
D)  Nitrite 
E)  Ammonia

Question 15

Refer to the figure showing two different plant symbioses.   In both A and B, the fungal and bacterial cells remain surrounded by plant plasma membrane instead of directly entering the plant cells.What advantage does this separation provide for the plant?

Accepted Answer

A)  It prevents the fungus or bacteria from becoming pathogenic. 
B)  It allows the plant to control what nutrients enter the plant cells from the fungus or bacteria. 
C)  It provides more surface area for nutrient exchange with the fungus or bacteria. 
D)  It prevents fungus and bacteria from colonizing the same cells. 
E)  There is no advantage to the plant, only to the fungus or bacteria. 
A)  It prevents the fungus or bacteria from becoming pathogenic. 
B)  It allows the plant to control what nutrients enter the plant cells from the fungus or bacteria. 
C)  It provides more surface area for nutrient exchange with the fungus or bacteria. 
D)  It prevents fungus and bacteria from colonizing the same cells. 
E)  There is no advantage to the plant, only to the fungus or bacteria.

Question 16

In a typical approach to identifying essential elements in plants, a plant growing hydroponically in a solution containing all known nutrients is transplanted to a solution _______.This approach is most effective at detecting nutrients needed in _______ amounts.

Accepted Answer

A)  lacking a single potential nutrient; small 
B)  lacking a single potential nutrient; large 
C)  lacking all known nutrients; small 
D)  lacking all known nutrients; large 
E)  having a single potential nutrient; small 
A)  lacking a single potential nutrient; small 
B)  lacking a single potential nutrient; large 
C)  lacking all known nutrients; small 
D)  lacking all known nutrients; large 
E)  having a single potential nutrient; small

Question 17

In plant metabolism, calcium

Accepted Answer

A)  plays a role in hormonal and environmental signaling. 
B)  is present in chlorophyll. 
C)  is a micronutrient. 
D)  is one of the "big three" macronutrients. 
E)  does not bind to clay particles. 
A)  plays a role in hormonal and environmental signaling. 
B)  is present in chlorophyll. 
C)  is a micronutrient. 
D)  is one of the "big three" macronutrients. 
E)  does not bind to clay particles.

Question 18

If a newly discovered plant is found to attract fungi to form mycorrhizae, it probably produces and releases

Accepted Answer

A)  acetosyringone. 
B)  auxin. 
C)  strigolactones. 
D)  tryptophan. 
E)  ATP. 
A)  acetosyringone. 
B)  auxin. 
C)  strigolactones. 
D)  tryptophan. 
E)  ATP.

Question 19

If urease is an enzyme involved in nitrogen metabolism, which essential element is most likely to be critical for nitrogen metabolism?

Accepted Answer

A)  Ni (nickel) 
B)  K (potassium) 
C)  S (sulfur) 
D)  C (carbon) 
E)  Cl (chlorine) 
A)  Ni (nickel) 
B)  K (potassium) 
C)  S (sulfur) 
D)  C (carbon) 
E)  Cl (chlorine)

Question 20

An old, leached soil is most likely to have

Accepted Answer

A)  low fertility. 
B)  more humus. 
C)  more silt. 
D)  high levels of Ni. 
E)  high levels of Ca. 
A)  low fertility. 
B)  more humus. 
C)  more silt. 
D)  high levels of Ni. 
E)  high levels of Ca.

Exam 35: Plant Nutrition

Root nodules fix nitrogen, but mycorrhizae help plants _______ chemical elements.

If a detector shows a large amount of nitrogen gas being produced by a patch of soil, that patch of soil must contain

In crop-rotation designs, why are soybeans, a type of legume, often planted in fields where corn was grown the year before?

If a plant forms an infection thread in one of its root hairs, it is preparing to form a

All nitrogen fixation is carried out by _______, some of which live in symbiosis with other organisms.

The large Rhizobium cells that live within plant root nodules are called _______.

Carnivorous plants are still considered to be _______ because they acquire energy from photosynthesis.

A newly discovered parasitic plant is found to have special threadlike leaves that penetrate the stems of the plants from which it steals nutrients.These leaves, therefore, have some of the same properties as

In almost all land plants, roots get most of their oxygen from

Which three elements are most commonly added to agricultural soils as fertilizers?

Carnivorous plants trap insects for

To attract rhizobial bacteria, plants from the bean family secrete what compounds into the soil?

Which molecule is not involved in the process of nitrogen fixation?

Refer to the figure showing two different plant symbioses. In both A and B, the fungal and bacterial cells remain surrounded by plant plasma membrane instead of directly entering the plant cells.What advantage does this separation provide for the plant?

In a typical approach to identifying essential elements in plants, a plant growing hydroponically in a solution containing all known nutrients is transplanted to a solution _______.This approach is most effective at detecting nutrients needed in _______ amounts.

In plant metabolism, calcium

If a newly discovered plant is found to attract fungi to form mycorrhizae, it probably produces and releases

If urease is an enzyme involved in nitrogen metabolism, which essential element is most likely to be critical for nitrogen metabolism?

An old, leached soil is most likely to have

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

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Speciation

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Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

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In a typical approach to identifying essential elements in plants, a plant growing hydroponically in a solution containing all known nutrients is transplanted to a solution _.This approach is most effective at detecting nutrients needed in _ amounts.