Question 1

Choose the letter of the best match from the following:
-Component of chlorophyll,activates many enzymes,divalent cation.

Accepted Answer

A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium 
A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium

Question 2

Heavy metals in contaminated soils can be taken up by hyper-accumulating plants.Lead and cadmium taken up this way are often accumulated in the plants'

Accepted Answer

A) rhizomes. 
B) trichomes. 
C) stomates. 
D) sclerenchyma. 
E) root nodules. 
A) rhizomes. 
B) trichomes. 
C) stomates. 
D) sclerenchyma. 
E) root nodules.

Question 3

In topsoil,which of these components usually represents the greatest volume?

Accepted Answer

A) mineral particles of varying size 
B) living organisms 
C) humus 
D) roots 
E) air and water 
A) mineral particles of varying size 
B) living organisms 
C) humus 
D) roots 
E) air and water

Question 4

Natural communities recycle nutrients,but cultivated communities often require an input of mineral nutrients due to losses through

Accepted Answer

A) erosion. 
B) humus. 
C) nitrogen fixation. 
D) crop rotation. 
E) iron accumulation. 
A) erosion. 
B) humus. 
C) nitrogen fixation. 
D) crop rotation. 
E) iron accumulation.

Question 5

Which of the following is not a natural process of plants that can be used by humans to remove toxins from soils?

Accepted Answer

A) secretion of a substance from the roots that breaks down the toxic chemical 
B) "storage" of a toxic chemical in plant tissues,which are then removed from the site 
C) root pressure pushes toxins from deep in the soil towards the surface 
D) physiological breakdown of the chemical into harmless products 
E) transport of toxins absorbed by the roots into the shoots,where they can be collected more easily 
A) secretion of a substance from the roots that breaks down the toxic chemical 
B) "storage" of a toxic chemical in plant tissues,which are then removed from the site 
C) root pressure pushes toxins from deep in the soil towards the surface 
D) physiological breakdown of the chemical into harmless products 
E) transport of toxins absorbed by the roots into the shoots,where they can be collected more easily

Question 6

The effects of elevated atmospheric CO2 concentrations

Accepted Answer

A) have the potential to alter the nutritional status of plants. 
B) have the potential to allow herbivores to eat less plant matter. 
C) have no effect on nutrient levels found in plant leaves. 
D) allow the plant to use O2 more efficiently in photosynthesis. 
E) cause an increase in Rubisco production. 
A) have the potential to alter the nutritional status of plants. 
B) have the potential to allow herbivores to eat less plant matter. 
C) have no effect on nutrient levels found in plant leaves. 
D) allow the plant to use O2 more efficiently in photosynthesis. 
E) cause an increase in Rubisco production.

Question 7

Although symbiotic relationships between nitrogen-fixing bacteria and plants are rare,many plants have symbiotic relationships with

Accepted Answer

A) other plants. 
B) nematode worms in the soil. 
C) filamentous algae. 
D) mycorrhizal fungi in the soil. 
E) soil insects. 
A) other plants. 
B) nematode worms in the soil. 
C) filamentous algae. 
D) mycorrhizal fungi in the soil. 
E) soil insects.

Question 8

Which of the following is not a plant macronutrient?

Accepted Answer

A) boron 
B) potassium 
C) phosphorus 
D) nitrogen 
E) sulfur 
A) boron 
B) potassium 
C) phosphorus 
D) nitrogen 
E) sulfur

Question 9

Plants can remove harmful chemicals from the soil by the process of

Accepted Answer

A) glandular secretion by leaves. 
B) CO2 activation. 
C) phytoremediation. 
D) fertilization. 
E) root nodule formation. 
A) glandular secretion by leaves. 
B) CO2 activation. 
C) phytoremediation. 
D) fertilization. 
E) root nodule formation.

Question 10

Which of the following statements about plant macronutrients is not true?

Accepted Answer

A) They approach or exceed 1% of a healthy plant's dry weight. 
B) They reduce the need for CO2 during photosynthesis. 
C) A deficiency in any one can have severe effects on a plant's growth. 
D) They can have important implications for human nutrition. 
E) The ability of the plants to uptake minerals is affected by soil pH. 
A) They approach or exceed 1% of a healthy plant's dry weight. 
B) They reduce the need for CO2 during photosynthesis. 
C) A deficiency in any one can have severe effects on a plant's growth. 
D) They can have important implications for human nutrition. 
E) The ability of the plants to uptake minerals is affected by soil pH.

Question 11

Plants need ammonia (NH3)to

Accepted Answer

A) build amino acids. 
B) build fatty acids. 
C) build micronutrients. 
D) fix nitrogen. 
E) deter herbivores. 
A) build amino acids. 
B) build fatty acids. 
C) build micronutrients. 
D) fix nitrogen. 
E) deter herbivores.

Question 12

During the initiation of nitrogen-fixation nodules,the host plant releases what type of molecules that signal the Rhizobium bacteria?

Accepted Answer

A) sugars 
B) proteins 
C) transcription factors 
D) flavonoids 
E) Nod factors 
A) sugars 
B) proteins 
C) transcription factors 
D) flavonoids 
E) Nod factors

Question 13

When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations,they abandon support of the nodules and end the symbiosis.Why?

Accepted Answer

A) The mineral nutrients inhibit nitrogenase activity. 
B) Nitrogen gas is no longer available in the soil. 
C) The nitrogen-fixation process is very expensive for the plant. 
D) The dissolved chemical nutrients are toxic to Rhizobium bacteria. 
E) Dissolved nitrogen uncurls the root hairs,releasing the nodulE. 
A) The mineral nutrients inhibit nitrogenase activity. 
B) Nitrogen gas is no longer available in the soil. 
C) The nitrogen-fixation process is very expensive for the plant. 
D) The dissolved chemical nutrients are toxic to Rhizobium bacteria. 
E) Dissolved nitrogen uncurls the root hairs,releasing the nodulE.

Question 14

Why do nitrogen-fixation nodules contain large amounts of leghemoglobin?

Accepted Answer

A) It helps transport oxygen to the bacteriA. 
B) The nitrogenase enzyme interacts with the iron in the leghemoglobin. 
C) The leghemoglobin helps break the triple bond of N2. 
D) It stimulates the Nod factors. 
E) It prevents oxygen from inhibiting the nitrogenase enzymE. 
A) It helps transport oxygen to the bacteriA. 
B) The nitrogenase enzyme interacts with the iron in the leghemoglobin. 
C) The leghemoglobin helps break the triple bond of N2. 
D) It stimulates the Nod factors. 
E) It prevents oxygen from inhibiting the nitrogenase enzymE.

Question 15

Choose the letter of the best match from the following:
-Required for protein synthesis and operation of stomata.

Accepted Answer

A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium 
A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium

Question 16

Trichlorotheylene (TCE)is toxic to humans because it

Accepted Answer

A) depletes nitrogen from soils. 
B) is carcinogenic. 
C) contains heavy metals. 
D) prevents CO2 production by plants. 
E) causes a decrease in the yield of crop plants. 
A) depletes nitrogen from soils. 
B) is carcinogenic. 
C) contains heavy metals. 
D) prevents CO2 production by plants. 
E) causes a decrease in the yield of crop plants.

Question 17

Choose the letter of the best match from the following:
-Component of ADP,ATP,nucleic acids,and several coenzymes.

Accepted Answer

A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium 
A) nitrogen 
B) calcium 
C) potassium 
D) phosphorus 
E) magnesium

Question 18

Insectivorous plants such as the Venus flytrap,pitcher plant,and bladderworts often grow in

Accepted Answer

A) loams. 
B) sandy soil. 
C) clay soil. 
D) marshes. 
E) acidic soils. 
A) loams. 
B) sandy soil. 
C) clay soil. 
D) marshes. 
E) acidic soils.

Question 19

Splitting the triple bonds of a N2 molecule with the nitrogenase enzyme requires ______ ATPs.

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 16 
E) 32 
A) 2 
B) 4 
C) 8 
D) 16 
E) 32

Question 20

The Nod factor is an important component of

Accepted Answer

A) the formation of the digestive enzymes of carnivorous plants. 
B) legume-bacterial interactions. 
C) inorganic fertilizers. 
D) the Calvin Cycle. 
E) photorespiration. 
A) the formation of the digestive enzymes of carnivorous plants. 
B) legume-bacterial interactions. 
C) inorganic fertilizers. 
D) the Calvin Cycle. 
E) photorespiration.

Exam 39: Plant Nutrition and Soils

Choose the letter of the best match from the following: -Component of chlorophyll,activates many enzymes,divalent cation.

Heavy metals in contaminated soils can be taken up by hyper-accumulating plants.Lead and cadmium taken up this way are often accumulated in the plants'

In topsoil,which of these components usually represents the greatest volume?

Natural communities recycle nutrients,but cultivated communities often require an input of mineral nutrients due to losses through

Which of the following is not a natural process of plants that can be used by humans to remove toxins from soils?

The effects of elevated atmospheric CO2 concentrations

Although symbiotic relationships between nitrogen-fixing bacteria and plants are rare,many plants have symbiotic relationships with

Which of the following is not a plant macronutrient?

Plants can remove harmful chemicals from the soil by the process of

Which of the following statements about plant macronutrients is not true?

Plants need ammonia (NH3)to

During the initiation of nitrogen-fixation nodules,the host plant releases what type of molecules that signal the Rhizobium bacteria?

When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations,they abandon support of the nodules and end the symbiosis.Why?

Why do nitrogen-fixation nodules contain large amounts of leghemoglobin?

Choose the letter of the best match from the following: -Required for protein synthesis and operation of stomata.

Trichlorotheylene (TCE)is toxic to humans because it

Choose the letter of the best match from the following: -Component of ADP,ATP,nucleic acids,and several coenzymes.

Insectivorous plants such as the Venus flytrap,pitcher plant,and bladderworts often grow in

Splitting the triple bonds of a N2 molecule with the nitrogenase enzyme requires ______ ATPs.

The Nod factor is an important component of

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes Mapping and the Meiosis - Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics and the Phylogenetic Revolution

Genome Evolution

Evolution of Development

The Tree of Life

Viruses

Prokaryotes

Protists

Overview of Green Plants

Fungi

Overview of Animal Diversity

Noncoelomate Invertebrates

Coelomate Invertebrates

Vertebrates

Plant Form

Vegetative Plant Development

Transport in Plants

Plant Defense Responses

Sensory Systems in Plants

Plant Reproduction

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Animal Development

Behavioral Biology

Population Ecology

Community of Ecology

Dynamics of Ecosystems

The Biosphere

Conservation Biology

The effects of elevated atmospheric CO₂ concentrations

Plants need ammonia (NH₃)to

Splitting the triple bonds of a N₂ molecule with the nitrogenase enzyme requires ______ ATPs.