Question 1

Choose the letter of the best match from the following:
-Contained in amino acids,proteins,nucleic acids,chlorophyll.

Accepted Answer

A)  nitrogen
B)  calcium
C)  potassium
D)  phosphorus
E)  magnesiumF) B) and E)
G) A) and C)

Question 2

What makes a mineral element essential for plant growth?

Accepted Answer

A)  It is part of typical chemical fertilizers.
B)  It can only be found in organic fertilizers.
C)  If it is missing,the plant cannot grow or reproduce normally.
D)  As its concentration increases,the plant grows more.
E)  It contributes to the solute potential of the plant.F) A) and D)
G) A) and B)

Question 3

During the initiation of nitrogen-fixation nodules,how do the Rhizobium bacteria enter into the cortex of the root?

Accepted Answer

A)  through the plasmadesmata of the root hairs
B)  via the apoplastic pathway
C)  proton pumps
D)  a membrane tube called an infection thread
E)  by repeated cell divisionsF) B) and E)
G) A) and B)

Question 4

In acidic soils or in habitats subjected to prolonged acid rain,what element is often released from rocks that is toxic to many plants?

Accepted Answer

A)  iron
B)  chlorine
C)  molybdenum
D)  selenium
E)  aluminumF) A) and E)
G) All of the above

Question 5

Which of the following combinations of plant nutrients make up about 94% of a plant's dry weight?

Accepted Answer

A)  nitrogen,phosphorus,and potassium
B)  carbon,iron,and phosphorus
C)  calcium,chlorine,and manganese
D)  zinc,oxygen,and boron
E)  carbon,oxygen,and hydrogenF) None of the above
G) B) and C)

Question 6

The ongoing growth of a plant does not require

Accepted Answer

A)  light input.
B)  nutrient input.
C)  oxygen for photosynthesis.
D)  CO2.
E)  water absorption.F) B) and D)
G) C) and D)

Question 7

Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?

Accepted Answer

A)  carbon
B)  CO2
C)  O2
D)  nitrogen
E)  ironF) All of the above
G) C) and E)

Question 8

Which of these is not a characteristic of soil?

Accepted Answer

A)  It is made up of one or more kinds of minerals.
B)  It is the product of weathering of rocks.
C)  The mineral and organic soil particles have mostly negatively-charged surfaces.
D)  Negatively charged ions predominate in the soil solution.
E)  Positive ions are readily available to plants.F) A) and E)
G) B) and E)

Question 9

Inserting a cloned gene for a certain plasma membrane transporter into crop plants could lead to

Accepted Answer

A)  the ability of a plant to produce its own micronutrients.
B)  extra uptake of minerals that would fortify the crop for human consumption.
C)  the evolution of nodule-formation on the crop plant.
D)  elevated CO2 levels in the atmosphere.
E)  plants taking up enough minerals that they no longer need to photosynthesizE.F) B) and E)
G) A) and B)

Question 10

If increased CO2 concentrations result in plant tissue that is less nutritious,which of these is not a potential consequence for insect herbivores?

Accepted Answer

A)  They must eat more tissue.
B)  Their development may be slowed.
C)  They grow fatter because their diet has more carbohydrates.
D)  They use up more energy trying to eat for fooD.
E)  Their reproductive cycles may be disrupted because their rate of growth changes.F) None of the above
G) All of the above

Question 11

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

Accepted Answer

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

Question 12

In magnesium-deficient plants the older leaves show more severe symptoms of chlorosis than younger leaves.What is the best explanation?

Accepted Answer

A)  There is more time for the symptoms to develop in older leaves.
B)  Chlorophyll is transported from the older leaves to the younger leaves.
C)  Magnesium is more soluble in younger leaves.
D)  Scarce magnesium is removed from older leaves and translocated to support younger,more active leaves.
E)  Older leaves need less chlorophyll.F) A) and D)
G) A) and E)

Question 13

Certain plants have been genetically modified to secrete citrate,which helps

Accepted Answer

A)  make the phosphate in soils more soluble.
B)  plants make necessary micronutrients.
C)  reveal mineral deficiencies in a plant.
D)  make hydroponic growth possible.
E)  plants add metals to the soil in which they are growing.F) B) and C)
G) A) and C)

Exam 39: Plant Nutrition and Soils

Which of the following combinations of plant nutrients make up about 94% of a plant's dry weight?

Correct Answer
verified

What makes a mineral element essential for plant growth?

Correct Answer
verified

If increased CO₂ concentrations result in plant tissue that is less nutritious,which of these is not a potential consequence for insect herbivores?

Correct Answer
verified

Which of these is not a characteristic of soil?

Correct Answer
verified

Certain plants have been genetically modified to secrete citrate,which helps

Correct Answer
verified

During the initiation of nitrogen-fixation nodules,how do the Rhizobium bacteria enter into the cortex of the root?

Correct Answer
verified

In magnesium-deficient plants the older leaves show more severe symptoms of chlorosis than younger leaves.What is the best explanation?

Correct Answer
verified

Choose the letter of the best match from the following: -Contained in amino acids,proteins,nucleic acids,chlorophyll.

Correct Answer
verified

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

Correct Answer
verified

In acidic soils or in habitats subjected to prolonged acid rain,what element is often released from rocks that is toxic to many plants?

Correct Answer
verified

The ongoing growth of a plant does not require

Correct Answer
verified

Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?

Correct Answer
verified

Inserting a cloned gene for a certain plasma membrane transporter into crop plants could lead to

Correct Answer
verified

Exam 39: Plant Nutrition and Soils

Which of the following combinations of plant nutrients make up about 94% of a plant's dry weight?

Correct AnswerverifiedShow Answer

What makes a mineral element essential for plant growth?

Correct AnswerverifiedShow Answer

If increased CO2 concentrations result in plant tissue that is less nutritious,which of these is not a potential consequence for insect herbivores?

Correct AnswerverifiedShow Answer

Which of these is not a characteristic of soil?

Correct AnswerverifiedShow Answer

Certain plants have been genetically modified to secrete citrate,which helps

Correct AnswerverifiedShow Answer

During the initiation of nitrogen-fixation nodules,how do the Rhizobium bacteria enter into the cortex of the root?

Correct AnswerverifiedShow Answer

In magnesium-deficient plants the older leaves show more severe symptoms of chlorosis than younger leaves.What is the best explanation?

Correct AnswerverifiedShow Answer

Choose the letter of the best match from the following: -Contained in amino acids,proteins,nucleic acids,chlorophyll.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In acidic soils or in habitats subjected to prolonged acid rain,what element is often released from rocks that is toxic to many plants?

Correct AnswerverifiedShow Answer

The ongoing growth of a plant does not require

Correct AnswerverifiedShow Answer

Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?

Correct AnswerverifiedShow Answer

Inserting a cloned gene for a certain plasma membrane transporter into crop plants could lead to

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

If increased CO₂ concentrations result in plant tissue that is less nutritious,which of these is not a potential consequence for insect herbivores?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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