Question 1

A chemically complex,hard to digest spongy organic substance,containing carbon found in soil is:

Accepted Answer

A)  Humus
B)  Creosote
C)  Silt
D)  Topsoil
E)  ClayF) B) and E)
G) C) and D)

Question 2

"P" is the chemical symbol for:

Accepted Answer

A)  Nickel
B)  Potassium
C)  Plutonium
D)  Phosphorous
E)  CopperF) B) and C)
G) D) and E)

Question 3

The water absorption rate of a plant's roots is greatly increased by:

Accepted Answer

A)  Presence of many stomata
B)  Presence of root hairs
C)  Association with Mycorrhizal fungi and presence of root hairs
D)  Association with Mycorrhizal fungi
E)  Presence of many stomata and root hairsF) None of the above
G) D) and E)

Question 4

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.Why would the plant divert so much energy to Rhizobium?

Accepted Answer

A)  Because Rhizobium produces NH4
B)  Because Rhizobium produces N2
C)  Because Rhizobium produces sugars
D)  Because Rhizobium protects the plants from predators
E)  Because Rhizobium protects the plants from parasitesF) A) and C)
G) A) and B)

Question 5

Carnivorous plants exist only in science fiction.

Accepted Answer

A) True 
 B)False

Question 6

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)  Facilitated diffusion; osmosis
C)  Gravity; active transport
D)  Active transport; osmosis
E)  Osmosis; gravityF) None of the above
G) C) and E)

Question 7

During which of the times below is a plant at greatest risk for the formation of air bubbles in the xylem stream?

Accepted Answer

A)  Night
B)  Morning
C)  Afternoon
D)  The risk is the same at any time of dayE) A) and B)
F) None of the above

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Using organic matter such as manure or compost for fertilizer:

Accepted Answer

A)  Improves fertility
B)  Aerates the soil
C)  Increases the water holding capacity of the soil
D)  Provides food for beneficial soil microorganisms
E)  All are correctF) B) and D)
G) C) and D)

Question 10

What hypothesis were the researchers testing?

Accepted Answer

A)  Providing extra nutrients would reduce the needs for extra leaves
B)  Providing extra light would increase leaf production
C)  Providing extra light would increase the need for nutrients
D)  Cutting leaves would diminish the need for more nutrients
E)  Providing extra nutrients would increase leaf productionF) C) and D)
G) B) and C)

Question 11

Aphids secrete a substance called "honeydew" that helped scientists determine the composition of phloem sap.

Accepted Answer

A) True 
 B)False

Question 12

Throughout a growing season,a plant uses up to 1000 liters (or kg) of water to produce just 1 kilogram of tissue.What happens to most of the remaining 999 kg of water?

Accepted Answer

A)  It is used in the cytoplasm
B)  It is used in photosynthesis
C)  It is used in hydrolysis reactions
D)  It evaporates
E)  It passes back through the roots into the soilF) B) and C)
G) A) and E)

Question 13

What can you conclude about the grass in your lawn if the recommended fertilizer has an N-P-K ratio of 29-3-4?

Accepted Answer

A)  It needs a lot of water
B)  It is not a legume
C)  It has a taproot
D)  It is parasitic
E)  P and K are not essential nutrientsF) C) and D)
G) B) and D)

Question 14

The part of a plant's roots that forces water to enter cells and move into the xylem is the Casparian strip.

Accepted Answer

A) True 
 B)False

Exam 22: Plant Nutrition and Transport

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

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.Why would the plant divert so much energy to Rhizobium?

Correct Answer
verified

Aphids secrete a substance called "honeydew" that helped scientists determine the composition of phloem sap.

Correct Answer
verified

What hypothesis were the researchers testing?

Correct Answer
verified

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

Correct Answer
verified

The part of a plant's roots that forces water to enter cells and move into the xylem is the Casparian strip.

Correct Answer
verified

Throughout a growing season,a plant uses up to 1000 liters (or kg) of water to produce just 1 kilogram of tissue.What happens to most of the remaining 999 kg of water?

Correct Answer
verified

The water absorption rate of a plant's roots is greatly increased by:

Correct Answer
verified

Using organic matter such as manure or compost for fertilizer:

Correct Answer
verified

Carnivorous plants exist only in science fiction.

Correct Answer
verified

During which of the times below is a plant at greatest risk for the formation of air bubbles in the xylem stream?

Correct Answer
verified

What can you conclude about the grass in your lawn if the recommended fertilizer has an N-P-K ratio of 29-3-4?

Correct Answer
verified

"P" is the chemical symbol for:

Correct Answer
verified

A chemically complex,hard to digest spongy organic substance,containing carbon found in soil is:

Correct Answer
verified

Exam 22: Plant Nutrition and Transport

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

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.Why would the plant divert so much energy to Rhizobium?

Correct AnswerverifiedShow Answer

Aphids secrete a substance called "honeydew" that helped scientists determine the composition of phloem sap.

Correct AnswerverifiedShow Answer

What hypothesis were the researchers testing?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The part of a plant's roots that forces water to enter cells and move into the xylem is the Casparian strip.

Correct AnswerverifiedShow Answer

Throughout a growing season,a plant uses up to 1000 liters (or kg) of water to produce just 1 kilogram of tissue.What happens to most of the remaining 999 kg of water?

Correct AnswerverifiedShow Answer

The water absorption rate of a plant's roots is greatly increased by:

Correct AnswerverifiedShow Answer

Using organic matter such as manure or compost for fertilizer:

Correct AnswerverifiedShow Answer

Carnivorous plants exist only in science fiction.

Correct AnswerverifiedShow Answer

During which of the times below is a plant at greatest risk for the formation of air bubbles in the xylem stream?

Correct AnswerverifiedShow Answer

What can you conclude about the grass in your lawn if the recommended fertilizer has an N-P-K ratio of 29-3-4?

Correct AnswerverifiedShow Answer

"P" is the chemical symbol for:

Correct AnswerverifiedShow Answer

A chemically complex,hard to digest spongy organic substance,containing carbon found in soil is:

Correct AnswerverifiedShow Answer

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

Correct Answer
verified

Correct Answer
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Correct Answer
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