Question 1

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 2

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. C

Question 3

Bony marine fish

Accepted Answer

A) drink sea water. 
B) secrete Na+ into the surrounding water. 
C) are hyperosmotic compared to the surrounding water. 
D) both drink sea water and secrete Na+ into the surrounding water. 
E) drink sea water,secrete Na+ into the surrounding water,and are hyperosmotic compared to the surrounding water. 
A) drink sea water. 
B) secrete Na+ into the surrounding water. 
C) are hyperosmotic compared to the surrounding water. 
D) both drink sea water and secrete Na+ into the surrounding water. 
E) drink sea water,secrete Na+ into the surrounding water,and are hyperosmotic compared to the surrounding water. D

Question 4

The potential for evaporative water loss by terrestrial organisms

Accepted Answer

A) decreases with increased vapor pressure deficit. 
B) decreases with decreased vapor pressure deficit. 
C) increases with decreased vapor pressure deficit. 
D) increases with increased vapor pressure deficit. 
E) None of the choices are correct. 
A) decreases with increased vapor pressure deficit. 
B) decreases with decreased vapor pressure deficit. 
C) increases with decreased vapor pressure deficit. 
D) increases with increased vapor pressure deficit. 
E) None of the choices are correct.

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 7

The Namib Desert beetle,Onymacris unguicularis,obtains its water through positional maneuvers during foggy weather conditions.

Accepted Answer

A) True 
 B)False

Question 8

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.

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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 11

Relative humidity = [ ___________________ / saturation water vapor density] x 100

Accepted Answer

The answer of Relative humidity = [ ___________________ / saturation...

Question 12

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 13

The camel and saguaro cactus both

Accepted Answer

A) acquire massive amounts of water when water is available. 
B) allow their internal temperature to rise. 
C) reduce surface area exposed to direct sunlight. 
D) reflect sunlight with dense hairs. 
E) All of the choices are correct. 
A) acquire massive amounts of water when water is available. 
B) allow their internal temperature to rise. 
C) reduce surface area exposed to direct sunlight. 
D) reflect sunlight with dense hairs. 
E) All of the choices are correct.

Question 14

Sharks,rays,and skates retain urea and trimethylamine oxide (TMAO)within their blood allowing them to become only slightly hyperosmotic thereby reducing the cost of osmoregulation.

Accepted Answer

A) True 
 B)False

Question 15

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 16

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 17

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

Question 18

Water conservation mechanisms used by plants adapted to dry conditions include

Accepted Answer

A) dropping leaves. 
B) thick leaves. 
C) fewer stomata. 
D) dormancy. 
E) All of the choices are correct. 
A) dropping leaves. 
B) thick leaves. 
C) fewer stomata. 
D) dormancy. 
E) All of the choices are correct.

Question 19

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 20

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

Accepted Answer

A) True 
 B)False

Exam 6: Water Relations

Water vapor is continuously added to the air by

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

Bony marine fish

The potential for evaporative water loss by terrestrial organisms

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

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

The Namib Desert beetle,Onymacris unguicularis,obtains its water through positional maneuvers during foggy weather conditions.

The evaporative water loss by an organism is high when the

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

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

Relative humidity = [ ___________________ / saturation water vapor density] x 100

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

The camel and saguaro cactus both

Sharks,rays,and skates retain urea and trimethylamine oxide (TMAO)within their blood allowing them to become only slightly hyperosmotic thereby reducing the cost of osmoregulation.

Movement of water _____________ its concentration gradient is called ________________.

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

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

Water conservation mechanisms used by plants adapted to dry conditions include

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

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

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

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

Movement of water _ its concentration gradient is called ____.