Question 1

Water flows from the soil into the plant roots because the water potential of the soil is higher than the water potential of the roots.

Accepted Answer

A) True 
 B)False

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.

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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 5

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 6

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

Accepted Answer

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

Question 7

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Most water loss in terrestrial animals is due to evaporation.

Accepted Answer

A) True 
 B)False

Question 10

A high water vapor pressure deficit indicates that the water vapor content of the air is near saturation.

Accepted Answer

A) True 
 B)False

Question 11

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 12

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 13

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 14

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.

Water flows from the soil into the plant roots because the water potential of the soil is higher than the water potential of the roots.

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

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

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.

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

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

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

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

Most water loss in terrestrial animals is due to evaporation.

A high water vapor pressure deficit indicates that the water vapor content of the air is near saturation.

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

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.

The evaporative water loss by an organism is high when the

Bony marine fish

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

Socail 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

Exam 6: Water Relations

Water flows from the soil into the plant roots because the water potential of the soil is higher than the water potential of the roots.

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

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

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.

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

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

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

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

Most water loss in terrestrial animals is due to evaporation.

A high water vapor pressure deficit indicates that the water vapor content of the air is near saturation.

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

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.

The evaporative water loss by an organism is high when the

Bony marine fish

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

Socail 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^-.