Question 1

The bacterium Rhizobium

Accepted Answer

A)   breaks the triple covalent bond in N2.
B)   enters plants through the root hairs.
C)   All of the answer choices are correct.
D)   lives symbiotically within plant cells.
E)   triggers the development of root nodules in legumes.F) None of the above
G) C) and E)

Question 2

The tendency of water molecules to attract one another because of hydrogen bonds is

Accepted Answer

A)   hydrolysis.
B)   cohesion.
C)   condensation.
D)   adhesion.
E)   evaporation.F) A) and B)
G) D) and E)

Question 3

Soybeans will have several hundred Rhizobium nodules per plant and may divert 20-30 percent of its energy generated by photosynthesis to the nodule instead of to other plant functions when the nodule is actively fixing nitrogen.Which of the following best describes Rhizobium?

Accepted Answer

A)   antagonistic virus that invades the root
B)   mutualistic bacterium that penetrates the root
C)   parasitic plant that invades the root
D)   multicellular mycelium that invades the root
E)   decomposer soil fungus that invades the rootF) A) and C)
G) B) and D)

Question 4

The cohesion-tension theory explains how water moves within a plant.

Accepted Answer

A) True 
 B)False

Question 5

Carnivorous plants exist only in science fiction.

Accepted Answer

A) True 
 B)False

Question 6

In lab,you collect and analyze several soil samples,and find that there is a certain amount of spongy,hard-to-digest carbon complex,mostly within the topsoil.This is

Accepted Answer

A)   clay.
B)   silt.
C)   creosote.
D)   topsoil.
E)   humus.F) A) and B)
G) B) and E)

Question 7

Water is pulled from a plant's roots to its leaves by transpiration.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following macronutrients is not an element taken in primarily by the roots of the plant?

Accepted Answer

A)   calcium
B)   carbon
C)   magnesium
D)   phosphorus
E)   nitrogenF) A) and C)
G) C) and D)

Question 9

What hypothesis were Ellison and Gotelli testing when they manipulated concentrations of nutrients available to pitcher plants?

Accepted Answer

A)   Providing extra light would increase leaf production.
B)   Providing extra nutrients would increase photosynthetic leaf surface area.
C)   Providing extra light would increase the need for nutrients.
D)   Providing extra nutrients would reduce the need for extra leaves.
E)   Cutting leaves would diminish the need for more nutrients.F) D) and E)
G) B) and C)

Question 10

Mycorrhizal fungi decrease the ability of a plant's roots to absorb water.

Accepted Answer

A) True 
 B)False

Question 11

Scientists measured the pressure in the xylem of redwood trees at different heights and found that the higher they made their measurements,the lower the pressure.They extrapolated this to a pressure of zero,and concluded that the tallest a tree could grow is 122-130 meters.The tallest known tree on Earth is 112.7 meters.What assumption were the scientists making to conclude that when pressure was zero,the plant could grow no further?

Accepted Answer

A)   transpiration would be less than uptake of water from the xylem
B)   stems above that point could not transport sugars in their xylem
C)   leaves above that point would not receive any sunlight
D)   leaves above that point would not receive any water
E)   turgor pressure would be greater than gravityF) B) and C)
G) A) and B)

Question 12

A useful form of nitrogen is made available to plants through their

Accepted Answer

A)   roots.
B)   roots and leaves.
C)   leaves.
D)   stomata.
E)   stomata and leaves.F) A) and B)
G) All of the above

Question 13

Scientists measured the pressure in the xylem of redwood trees at different heights and found that the higher they made their measurements,the lower the pressure.They extrapolated this to a pressure of zero,and concluded that the tallest a tree could grow is 122-130 meters.The tallest known tree on Earth is 112.7 meters.Which of the following most likely limits the height of trees?

Accepted Answer

A)   amount of energy needed to pump water to the tops of the trees
B)   amount of photosynthesis in leaves
C)   amount of transpiration in leaves
D)   strength of water cohesion
E)   ability to take up CO2F) A) and B)
G) A) and C)

Question 14

Organisms that use light energy to assemble their own organic molecules from water and elements that they absorb from their environment are which of the following?

Accepted Answer

A)   heterotrophs
B)   omnivores
C)   autotrophs
D)   detritivores
E)   decomposersF) A) and D)
G) A) and E)

Question 15

The _____ and _____ of a plant's leaf help conserve water in a plant.

Accepted Answer

A)   root hairs; stomata
B)   Casparian strip; cuticle
C)   None of the answer choices are correct.
D)   Casparian strip; endodermis
E)   stomata; cuticleF) A) and B)
G) A) and E)

Question 16

During photosynthesis in a leaf,sugars are loaded into the sieve tube by _____,followed by ______ to increase the pressure.

Accepted Answer

A)   osmosis; facilitated diffusion
B)   osmosis; gravity
C)   facilitated diffusion; osmosis
D)   gravity; active transport
E)   active transport; osmosisF) D) and E)
G) A) and B)

Question 17

Which of the following will not increase the rate of transpiration in a plant?

Accepted Answer

A)   high humidity
B)   low humidity
C)   All of the answer choices are correct.
D)   high temperature
E)   high wind speedsF) A) and B)
G) C) and D)

Question 18

The importance of abscisic acid in the water conservation of a leaf is that it

Accepted Answer

A)   reacts with cuticle to seal any pores and expand to cover the stomatal openings.
B)   triggers a change in osmotic potential of the guard cells in a drought, forcing them to lose water and collapse to close.
C)   forces water in the leaf to flow through the endodermis, through the Casparian strip, and stay in the vascular tissues.
D)   interacts with the polar water molecules to produce positive pressure flow of the phloem solution.
E)   forces a change in osmotic potential of the guard cells to fill them with turgor pressure, opening them for transpiration.F) D) and E)
G) None of the above

Question 19

Water and minerals can move through a root's intracellular pathway from one cell to another through the

Accepted Answer

A)   plasmodesmata.
B)   stomata.
C)   Casparian strip.
D)   guard cells.
E)   companion cells.F) B) and D)
G) All of the above

Question 20

"P" is the elemental symbol for

Accepted Answer

A)   phosphorus.
B)   copper.
C)   nickel.
D)   plutonium.
E)   potassium.F) A) and C)
G) B) and D)

Exam 23: Plant Nutrition and Transport

Which of the following macronutrients is not an element taken in primarily by the roots of the plant?

Correct Answer
verified

Mycorrhizal fungi decrease the ability of a plant's roots to absorb water.

Correct Answer
verified

The importance of abscisic acid in the water conservation of a leaf is that it

Correct Answer
verified

Organisms that use light energy to assemble their own organic molecules from water and elements that they absorb from their environment are which of the following?

Correct Answer
verified

What hypothesis were Ellison and Gotelli testing when they manipulated concentrations of nutrients available to pitcher plants?

Correct Answer
verified

Soybeans will have several hundred Rhizobium nodules per plant and may divert 20-30 percent of its energy generated by photosynthesis to the nodule instead of to other plant functions when the nodule is actively fixing nitrogen.Which of the following best describes Rhizobium?

Correct Answer
verified

"P" is the elemental symbol for

Correct Answer
verified

The cohesion-tension theory explains how water moves within a plant.

Correct Answer
verified

Correct Answer
verified

A useful form of nitrogen is made available to plants through their

Correct Answer
verified

Which of the following will not increase the rate of transpiration in a plant?

Correct Answer
verified

Water and minerals can move through a root's intracellular pathway from one cell to another through the

Correct Answer
verified

The _ and _ of a plant's leaf help conserve water in a plant.

Correct Answer
verified

In lab,you collect and analyze several soil samples,and find that there is a certain amount of spongy,hard-to-digest carbon complex,mostly within the topsoil.This is

Correct Answer
verified

Correct Answer
verified

Carnivorous plants exist only in science fiction.

Correct Answer
verified

Water is pulled from a plant's roots to its leaves by transpiration.

Correct Answer
verified

The bacterium Rhizobium

Correct Answer
verified

During photosynthesis in a leaf,sugars are loaded into the sieve tube by _,followed by __ to increase the pressure.

Correct Answer
verified

The tendency of water molecules to attract one another because of hydrogen bonds is

Correct Answer
verified

Exam 23: Plant Nutrition and Transport

Which of the following macronutrients is not an element taken in primarily by the roots of the plant?

Correct AnswerverifiedShow Answer

Mycorrhizal fungi decrease the ability of a plant's roots to absorb water.

Correct AnswerverifiedShow Answer

The importance of abscisic acid in the water conservation of a leaf is that it

Correct AnswerverifiedShow Answer

Organisms that use light energy to assemble their own organic molecules from water and elements that they absorb from their environment are which of the following?

Correct AnswerverifiedShow Answer

What hypothesis were Ellison and Gotelli testing when they manipulated concentrations of nutrients available to pitcher plants?

Correct AnswerverifiedShow Answer

Soybeans will have several hundred Rhizobium nodules per plant and may divert 20-30 percent of its energy generated by photosynthesis to the nodule instead of to other plant functions when the nodule is actively fixing nitrogen.Which of the following best describes Rhizobium?

Correct AnswerverifiedShow Answer

"P" is the elemental symbol for

Correct AnswerverifiedShow Answer

The cohesion-tension theory explains how water moves within a plant.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A useful form of nitrogen is made available to plants through their

Correct AnswerverifiedShow Answer

Which of the following will not increase the rate of transpiration in a plant?

Correct AnswerverifiedShow Answer

Water and minerals can move through a root's intracellular pathway from one cell to another through the

Correct AnswerverifiedShow Answer

The _____ and _____ of a plant's leaf help conserve water in a plant.

Correct AnswerverifiedShow Answer

In lab,you collect and analyze several soil samples,and find that there is a certain amount of spongy,hard-to-digest carbon complex,mostly within the topsoil.This is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Carnivorous plants exist only in science fiction.

Correct AnswerverifiedShow Answer

Water is pulled from a plant's roots to its leaves by transpiration.

Correct AnswerverifiedShow Answer

The bacterium Rhizobium

Correct AnswerverifiedShow Answer

During photosynthesis in a leaf,sugars are loaded into the sieve tube by _____,followed by ______ to increase the pressure.

Correct AnswerverifiedShow Answer

The tendency of water molecules to attract one another because of hydrogen bonds is

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The _ and _ of a plant's leaf help conserve water in a plant.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

During photosynthesis in a leaf,sugars are loaded into the sieve tube by _,followed by __ to increase the pressure.

Correct Answer
verified

Correct Answer
verified