Deck 6: Water

Question 1

To estimate relative water content which three measures are needed?

A) Turgid weight, osmotic potential and wet weight
B) Turgor pressure, fresh weight and dry weight
C) Fresh weight, dry weight and turgid weight
D) Solute concentration, dry weight and wet weight
E) Fresh weight, turgid weight and osmotic potential

Answer 1

Fresh weight, dry weight and turgid weight

Question 2

Which nitrogenous waste product is so toxic that animals need to excrete it immediately?

A) Ammonia
B) Urea
C) Uric acid
D) Purines
E) Urohydrosis

Answer 2

Ammonia

Question 3

On a mountainside, the tree line is set by a combination of

A) high temperature and high winds.
B) water uptake and evaporation.
C) low temperature and low winds.
D) high temperature and low transpiration.
E) low temperature and high winds.

Answer 3

high temperature and high winds.

Question 4

When considering the effects of water on animal abundance, we know that in Africa

A) As the number of buffalo increase, rainfall increases
B) As rainfall increases, the number of buffalo increases
C) As rainfall increases, Lake Manyara water levels increase
D) Buffalo cannot live in Lake Manyara
E) Buffalo die when it is too wet

Question 5

Populations of which North American animals are not commonly limited by precipitation?

A) White tailed deer
B) Mallard ducks
C) Kangaroo rats
D) Pintail ducks

Question 6

How will global warming affect global precipitation patterns?

A) Rainfall will increase everywhere
B) Rainfall will decrease everywhere
C) Rainfall will increase over dry areas and decrease over wet areas
D) Rainfall will increase over wet areas and decrease over dry areas

Question 7

Which animals produce copious dilute urine?

A) Frogs and saltwater fish
B) Saltwater fish and mammals
C) Freshwater fish and birds
D) Freshwater fish and saltwater fish
E) Freshwater fish and frogs

Question 8

Which type(s) of organisms have to deal with too much water?

A) marine fish.
B) freshwater fish.
C) terrestrial plants.
D) terrestrial animals.
E) all of the above.

Question 9

Which vertebrates ingest salt water and expel it through salt glands?

A) Whales
B) Dolphins
C) Sea snakes
D) Marine turtles and sea birds
E) Walruses

Question 10

Which of the following U.S. plants is commonly found on sand dunes?

A) Glasswort
B) Spartina grass
C) Mangrove trees
D) Sea oats

Question 11

Which of the following is a naturally occurring weak acid?

A) Hydrochloric acid
B) Carbonic acid
C) Sodium hydroxide
D) Sulfuric acid

Question 12

'Hard' water is generally rich in which ions?

A) Calcium
B) Magnesium
C) Potassium
D) Sodium
E) Sulfur

Question 13

Some plants accumulate inorganic salts in their vacuoles, balancing solute concentrations inside and outside of the cell and preventing osmotic water loss. Such plants could live in environments with

A) low temperatures.
B) high salt concentrations.
C) low salt concentrations.
D) high temperatures.
E) acid soils.

Question 14

Why is rainwater slightly acidic?

A) it contains hydrochloric acid
B) it contains ammonia.
C) it contains carabonic acid.
D) it contains bicarbonate.

Question 15

Which area has many naturally acidic lakes?

A) Norway
B) New York
C) Florida
D) Ohio
E) Sweden

Question 16

Increased lake acidity can interfere with gill function in fish because of increases in which toxic metals?

A) Mercury and copper
B) Copper and phosphorus
C) Aluminum and mercury
D) Copper and lead
E) Lead and aluminum

Question 17

Most plants grow best at a soil water pH of 6.5 because

A) normal rainwater is slightly acidic.
B) soil nutrients are most available to plants at this pH.
C) soil bacteria do not function well at a pH of less than 6.5.
D) most roots are killed a pH above 6.5.

Question 18

Acid rain can lower soil pH in terrestrial systems resulting in the lessening of which nutrients?

A) Calcium and potassium
B) Nitrogen and sodium
C) Nitrogen and calcium
D) Iron and copper
E) Molybdenum and manganese

Question 19

Over the 20th century the pH of seawater has decreased by:

A) 0.001
B) 0.01
C) 0.1
D) 0.2
E) 1.0

Question 20

The optimal pH range for freshwater fish and aquatic invertebrates is

A) 0-3
B) 3-6
C) 6-9
D) 9-12
E) 12-15

Question 21

Calciphobes grow only in acid soils.

Question 22

Water is incompressible.

Question 23

Ammonia is toxic so most organisms that produce it are terrestrial.

Question 24

Inland lakes are never salty.