Question 1

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) aluminum 
A) iron 
B) chlorine 
C) molybdenum 
D) selenium 
E) aluminum

Question 2

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 hydrogen 
A) nitrogen,phosphorus,and potassium 
B) carbon,iron,and phosphorus 
C) calcium,chlorine,and manganese 
D) zinc,oxygen,and boron 
E) carbon,oxygen,and hydrogen

Question 3

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

Question 4

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. 
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.

Question 5

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

Question 6

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. 
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.

Question 7

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. 
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.

Question 8

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 divisions 
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 divisions

Question 9

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. 
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.

Question 10

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) iron 
A) carbon 
B) CO2 
C) O2 
D) nitrogen 
E) iron

Question 11

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. 
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.

Question 12

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

Question 13

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. 
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.

Exam 39: Plant Nutrition and Soils

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

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

The ongoing growth of a plant does not require

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

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

What makes a mineral element essential for plant growth?

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

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

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

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

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

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

Which of these is not a characteristic of soil?

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

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How Cells Harvest Energy

Photosynthesis

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