Question 1

In general,a plant found growing in the desert can be expected to have a low shoot to high root biomass ratio.

Accepted Answer

A) True 
 B)False  True

Question 2

Water vapor is continuously added to the air by

Accepted Answer

A) transpiration. 
B) evaporation. 
C) both transpiration and evaporation. 
D) precipitation. 
E) both evaporation and precipitation. 
A) transpiration. 
B) evaporation. 
C) both transpiration and evaporation. 
D) precipitation. 
E) both evaporation and precipitation. C

Question 3

The evaporative water loss by an organism is high when the

Accepted Answer

A) vapor pressure deficit is low. 
B) relative humidity is high. 
C) water concentration gradient from the organism to the air is reduced. 
D) actual water vapor density is very low relative to the saturation water vapor density. 
E) All of the choices are correct. 
A) vapor pressure deficit is low. 
B) relative humidity is high. 
C) water concentration gradient from the organism to the air is reduced. 
D) actual water vapor density is very low relative to the saturation water vapor density. 
E) All of the choices are correct. D

Question 4

A cicada will use which of the following mechanisms in order to survive hot,dry conditions of the desert?

Accepted Answer

A) nocturnal behavior 
B) burrowing 
C) torpor 
D) sweating 
E) All of the choices are correct. 
A) nocturnal behavior 
B) burrowing 
C) torpor 
D) sweating 
E) All of the choices are correct.

Question 5

Windy days will decrease a plant's evaporative water loss.

Accepted Answer

A) True 
 B)False

Question 6

In general,a plant located in an arid climate will possess all of the following in order to prevent water loss except:

Accepted Answer

A) waxy coating. 
B) decreased root biomass. 
C) decreased shoot biomass. 
D) increased root length. 
E) reduces leaf size. 
A) waxy coating. 
B) decreased root biomass. 
C) decreased shoot biomass. 
D) increased root length. 
E) reduces leaf size.

Question 7

In a terrestrial plant,water movement is as follows:

Accepted Answer

A) from less negative water potential to a more negative water potential. 
B) from more negative water potential to a less negative water potential. 
C) from less positive water potential to a more positive water potential. 
D) from zero water potential to a more negative water potential. 
E) from zero water potential to a more positive water potential. 
A) from less negative water potential to a more negative water potential. 
B) from more negative water potential to a less negative water potential. 
C) from less positive water potential to a more positive water potential. 
D) from zero water potential to a more negative water potential. 
E) from zero water potential to a more positive water potential.

Question 8

Movement of water _____________ its concentration gradient is called ________________.

Accepted Answer

A) down; diffusion 
B) up; diffusion 
C) down; active transport 
D) up; osmosis 
E) None of the choices are correct. 
A) down; diffusion 
B) up; diffusion 
C) down; active transport 
D) up; osmosis 
E) None of the choices are correct.

Question 9

Desert kangaroo rats meet a portion of their water requirements through the metabolic processing of their food intake,but they still need to drink liquid water in order to survive.

Accepted Answer

A) True 
 B)False

Question 10

In order to survive in the desert,a camel will employ which of the following mechanisms?

Accepted Answer

A) face away from sun 
B) store water in its hump 
C) shed its fur 
D) allow its body temperature to rise 
E) All of the choices are correct. 
A) face away from sun 
B) store water in its hump 
C) shed its fur 
D) allow its body temperature to rise 
E) All of the choices are correct.

Question 11

Aquatic organisms whose body fluids equal that of their surroundings are

Accepted Answer

A) hyperosmotic. 
B) isoosmotic. 
C) hypoosmotic. 
D) osmotic. 
E) None of the choices are correct. 
A) hyperosmotic. 
B) isoosmotic. 
C) hypoosmotic. 
D) osmotic. 
E) None of the choices are correct.

Question 12

Freshwater fish and freshwater mosquitoes must actively excrete ions such as Na+ and Cl-.

Accepted Answer

A) True 
 B)False

Question 13

Aquatic organisms whose ionic concentration of their body fluids exceeds that of their surroundings are

Accepted Answer

A) hyperosmotic. 
B) hypoosmotic. 
C) isoosmotic. 
D) osmotic. 
E) None of the choices are correct. 
A) hyperosmotic. 
B) hypoosmotic. 
C) isoosmotic. 
D) osmotic. 
E) None of the choices are correct.

Question 14

Aquatic organisms whose ionic concentration of their body fluids is less than that of their surroundings are

Accepted Answer

A) hyperosmotic. 
B) isoosmotic. 
C) hypoosmotic. 
D) osmotic. 
E) None of the choices are correct. 
A) hyperosmotic. 
B) isoosmotic. 
C) hypoosmotic. 
D) osmotic. 
E) None of the choices are correct.

Question 15

Most water loss in terrestrial animals is due to evaporation.

Accepted Answer

A) True 
 B)False

Question 16

All of the following contribute to the movement of water in a terrestrial plant except:

Accepted Answer

A) transpiration. 
B) drying power of the sun. 
C) hydrogen bonding. 
D) water potential. 
E) None of the choices are correct. 
A) transpiration. 
B) drying power of the sun. 
C) hydrogen bonding. 
D) water potential. 
E) None of the choices are correct.

Question 17

In order to reduce heat gain,a camel will face into the sun.

Accepted Answer

A) True 
 B)False

Question 18

In general,desert organisms try to decrease their rate of evaporative cooling in order to conserve water.Which of the following desert organisms sweats?

Accepted Answer

A) camel 
B) cactus 
C) cicada 
D) scorpion 
E) tiger beetle 
A) camel 
B) cactus 
C) cicada 
D) scorpion 
E) tiger beetle

Question 19

A(n)___________ marine fish gains water through osmosis and loses salts through diffusion.

Accepted Answer

A) hyperosmotic 
B) hypoosmotic 
C) isoosmotic 
D) osmotic 
E) None of the choices are correct. 
A) hyperosmotic 
B) hypoosmotic 
C) isoosmotic 
D) osmotic 
E) None of the choices are correct.

Question 20

Which of the following may be used to study the uptake of water by plants in a natural ecosystem?

Accepted Answer

A) non-stable isotope analysis 
B) radioactive isotope analysis 
C) 14C isotope analysis 
D) stable isotope analysis 
E) water isotope analysis 
A) non-stable isotope analysis 
B) radioactive isotope analysis 
C) 14C isotope analysis 
D) stable isotope analysis 
E) water isotope analysis

Exam 6: Water Relations

In general,a plant found growing in the desert can be expected to have a low shoot to high root biomass ratio.

Water vapor is continuously added to the air by

The evaporative water loss by an organism is high when the

A cicada will use which of the following mechanisms in order to survive hot,dry conditions of the desert?

Windy days will decrease a plant's evaporative water loss.

In general,a plant located in an arid climate will possess all of the following in order to prevent water loss except:

In a terrestrial plant,water movement is as follows:

Movement of water _____________ its concentration gradient is called ________________.

Desert kangaroo rats meet a portion of their water requirements through the metabolic processing of their food intake,but they still need to drink liquid water in order to survive.

In order to survive in the desert,a camel will employ which of the following mechanisms?

Aquatic organisms whose body fluids equal that of their surroundings are

Freshwater fish and freshwater mosquitoes must actively excrete ions such as Na+ and Cl-.

Aquatic organisms whose ionic concentration of their body fluids exceeds that of their surroundings are

Aquatic organisms whose ionic concentration of their body fluids is less than that of their surroundings are

Most water loss in terrestrial animals is due to evaporation.

All of the following contribute to the movement of water in a terrestrial plant except:

In order to reduce heat gain,a camel will face into the sun.

In general,desert organisms try to decrease their rate of evaporative cooling in order to conserve water.Which of the following desert organisms sweats?

A(n)___________ marine fish gains water through osmosis and loses salts through diffusion.

Which of the following may be used to study the uptake of water by plants in a natural ecosystem?

Introduction to Ecology: Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Energy and Nutrient Relations

Social Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions: Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Nutrient Cycling and Retention

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

Movement of water _ its concentration gradient is called ____.

Freshwater fish and freshwater mosquitoes must actively excrete ions such as Na⁺ and Cl^-.