Question 1

Which of these is not considered a potentially dangerous heavy metal contaminant in soil?

Accepted Answer

A) cadmium 
B) iron 
C) arsenic 
D) lead 
E) zinc 
A) cadmium 
B) iron 
C) arsenic 
D) lead 
E) zinc B

Question 2

Which of the following is most limiting for plant growth,especially in relation to the plant's carbon uptake?

Accepted Answer

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

Question 3

A typical root pumps out H+ to maintain a strong membrane potential of about

Accepted Answer

A) -12 V. 
B) 120 V. 
C) 60 Hz. 
D) -160 mV. 
E) pH 5.0. 
A) -12 V. 
B) 120 V. 
C) 60 Hz. 
D) -160 mV. 
E) pH 5.0. D

Question 4

Inside nitrogen-fixing nodules,one N2 molecule is converted into two

Accepted Answer

A) N. 
B) NO. 
C) NO2. 
D) NO3. 
E) NH3. 
A) N. 
B) NO. 
C) NO2. 
D) NO3. 
E) NH3.

Question 5

Which of these is not affected strongly by elevated growth temperatures in plants?

Accepted Answer

A) photosynthesis 
B) respiration 
C) photorespiration 
D) transpiration 
E) carbon : nitrogen ratios in the plant tissues 
A) photosynthesis 
B) respiration 
C) photorespiration 
D) transpiration 
E) carbon : nitrogen ratios in the plant tissues

Question 6

Choose the letter of the best match from the following:
-Component of cell walls,involved in maintenance of membrane structure.

Accepted Answer

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

Question 7

Which of these insectivorous plants does not use an active trapping mechanism?

Accepted Answer

A) pitcher plants 
B) Venus flytraps 
C) sundews 
D) the aquatic waterwheel 
E) bladderworts 
A) pitcher plants 
B) Venus flytraps 
C) sundews 
D) the aquatic waterwheel 
E) bladderworts

Question 8

Mycorrhizae are especially effective in helping plant roots uptake

Accepted Answer

A) nitrogen. 
B) phosphorus. 
C) potassium. 
D) iron. 
E) magnesium. 
A) nitrogen. 
B) phosphorus. 
C) potassium. 
D) iron. 
E) magnesium.

Question 9

A primary advantage of using organic fertilizers compared to inorganic chemical fertilizers is that

Accepted Answer

A) less organic fertilizer is needed than chemical fertilizers. 
B) only organic fertilizers contain micronutrients. 
C) organic fertilizers release nutrients more slowly. 
D) chemical fertilizers are not soluble in water. 
E) chemical fertilizers break down very slowly. 
A) less organic fertilizer is needed than chemical fertilizers. 
B) only organic fertilizers contain micronutrients. 
C) organic fertilizers release nutrients more slowly. 
D) chemical fertilizers are not soluble in water. 
E) chemical fertilizers break down very slowly.

Question 10

Which of the following does not increase the level of nutrients available to crop plants?

Accepted Answer

A) adding humus to the soil 
B) crop rotation 
C) plowing crop residues under 
D) applying herbicides 
E) applying chemical fertilizers 
A) adding humus to the soil 
B) crop rotation 
C) plowing crop residues under 
D) applying herbicides 
E) applying chemical fertilizers

Question 11

A deficiency in a plant micronutrient

Accepted Answer

A) is less serious than a deficiency in a macronutrient. 
B) makes that plant susceptible to herbivores. 
C) can have a severe effect on plant growth. 
D) results in no visible symptoms. 
E) has no impact on the agriculture of a region. 
A) is less serious than a deficiency in a macronutrient. 
B) makes that plant susceptible to herbivores. 
C) can have a severe effect on plant growth. 
D) results in no visible symptoms. 
E) has no impact on the agriculture of a region.

Question 12

Why is it beneficial to plants that soil particles have negatively-charged surfaces?

Accepted Answer

A) It helps maintain the water potential of the soil. 
B) They attract positively-charged ions and prevent them from being washed deep into the soil. 
C) Negatively-charged ions are pushed towards the roots. 
D) Toxic metals are trapped and kept away from the plants. 
E) They capture negatively-charged ions. 
A) It helps maintain the water potential of the soil. 
B) They attract positively-charged ions and prevent them from being washed deep into the soil. 
C) Negatively-charged ions are pushed towards the roots. 
D) Toxic metals are trapped and kept away from the plants. 
E) They capture negatively-charged ions.

Question 13

The most important mineral nutrients added to soils in fertilizers are

Accepted Answer

A) nitrogen,phosphorous,and potassium. 
B) calcium and nitrogen. 
C) magnesium,phosphorus,and iron. 
D) sulfur. 
E) calcium carbonatE. 
A) nitrogen,phosphorous,and potassium. 
B) calcium and nitrogen. 
C) magnesium,phosphorus,and iron. 
D) sulfur. 
E) calcium carbonatE.

Question 14

Which of the following is not a plant micronutrient?

Accepted Answer

A) iron 
B) phosphorus 
C) chlorine 
D) copper 
E) manganese 
A) iron 
B) phosphorus 
C) chlorine 
D) copper 
E) manganese

Question 15

Which of the following statements about plants grown in hydroponic culture is true?

Accepted Answer

A) They no longer need to transport water through their xylem. 
B) They cannot be used for commercial purposes. 
C) They rarely get enough micronutrients. 
D) They are unable to photosynthesize. 
E) They are suspended with their roots in a nutrient solution. 
A) They no longer need to transport water through their xylem. 
B) They cannot be used for commercial purposes. 
C) They rarely get enough micronutrients. 
D) They are unable to photosynthesize. 
E) They are suspended with their roots in a nutrient solution.

Question 16

If the parasitic dodder plant (Cuscuta spp. )lacks chlorophyll,what types of nutrients is it most likely extracting from its host?

Accepted Answer

A) proteins 
B) mineral nutrients 
C) lipids 
D) carbohydrates 
E) nucleic acids 
A) proteins 
B) mineral nutrients 
C) lipids 
D) carbohydrates 
E) nucleic acids

Question 17

The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are

Accepted Answer

A) bogs. 
B) prairies. 
C) hilly slopes. 
D) grasslands. 
E) nitrogen-poor soils. 
A) bogs. 
B) prairies. 
C) hilly slopes. 
D) grasslands. 
E) nitrogen-poor soils.

Question 18

In several studies of plant responses to elevated CO2 concentrations in the atmosphere,scientists often found that the stimulation of growth gradually diminished because

Accepted Answer

A) more photorespiration occurred. 
B) C3 plants were replaced with C4 plants. 
C) the soil did not contain sufficient nitrogen and other nutrients to support the enhanced growth. 
D) the plants could not store the extra biomass. 
E) weedy plants took over the experimental plots. 
A) more photorespiration occurred. 
B) C3 plants were replaced with C4 plants. 
C) the soil did not contain sufficient nitrogen and other nutrients to support the enhanced growth. 
D) the plants could not store the extra biomass. 
E) weedy plants took over the experimental plots.

Question 19

Which of the following is not part of a nitrogen-fixing nodule?

Accepted Answer

A) root hairs 
B) cortex cells 
C) bacteroids 
D) vascular tissue 
E) lateral meristem 
A) root hairs 
B) cortex cells 
C) bacteroids 
D) vascular tissue 
E) lateral meristem

Question 20

Humus often enhances the water and nutrient-retaining properties of topsoil.Which of the following might increase the humus content of a soil the most?

Accepted Answer

A) nitrogen fertilizers 
B) organic fertilizers 
C) phosphorous fertilizers 
D) potassium fertilizers 
E) inorganic fertilizers 
A) nitrogen fertilizers 
B) organic fertilizers 
C) phosphorous fertilizers 
D) potassium fertilizers 
E) inorganic fertilizers

Exam 39: Plant Nutrition and Soils

Which of these is not considered a potentially dangerous heavy metal contaminant in soil?

Which of the following is most limiting for plant growth,especially in relation to the plant's carbon uptake?

A typical root pumps out H+ to maintain a strong membrane potential of about

Inside nitrogen-fixing nodules,one N2 molecule is converted into two

Which of these is not affected strongly by elevated growth temperatures in plants?

Choose the letter of the best match from the following: -Component of cell walls,involved in maintenance of membrane structure.

Which of these insectivorous plants does not use an active trapping mechanism?

Mycorrhizae are especially effective in helping plant roots uptake

A primary advantage of using organic fertilizers compared to inorganic chemical fertilizers is that

Which of the following does not increase the level of nutrients available to crop plants?

A deficiency in a plant micronutrient

Why is it beneficial to plants that soil particles have negatively-charged surfaces?

The most important mineral nutrients added to soils in fertilizers are

Which of the following is not a plant micronutrient?

Which of the following statements about plants grown in hydroponic culture is true?

If the parasitic dodder plant (Cuscuta spp. )lacks chlorophyll,what types of nutrients is it most likely extracting from its host?

The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are

In several studies of plant responses to elevated CO2 concentrations in the atmosphere,scientists often found that the stimulation of growth gradually diminished because

Which of the following is not part of a nitrogen-fixing nodule?

Humus often enhances the water and nutrient-retaining properties of topsoil.Which of the following might increase the humus content of a soil the most?

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

A typical root pumps out H⁺ to maintain a strong membrane potential of about

Inside nitrogen-fixing nodules,one N₂ molecule is converted into two

In several studies of plant responses to elevated CO₂ concentrations in the atmosphere,scientists often found that the stimulation of growth gradually diminished because