Chapter 6 Water Relations Ecology

Front 1

The movement of water and salts down their concentration gradients

Back 1

diffusion

Front 2

Camels conserve water by two ways

Back 2

1) reducing exposure to the sun

20insulating itself from high temperature

Front 3

The tension produced by the evaporation of water from the plant's leaves ____ the water potential within the entire plant

Back 3

reduces

Front 4

Being hyperosmotic mens that in the water balance, the value of W(o) is

Back 4

greater than zero

Front 5

To compensate for osmotic water loss, fish drink seawater. How do fish deal with the salts in the seawater?

Back 5

-They excrete Mg and SO4 through their kidneys

-They excrete Cl and Na from their gills

Front 6

The magnitude of soil matric potentials are ___ related to soil grain size, with coarse soils having ___ matric potentials than fine grained soils

Back 6

inversely; lower

Front 7

Greatest to least source of water intake for the Onymacris bettle

Back 7

fog->metabolism water-> food

Front 8

What are strategies used by plants to conserve water in arid environments?

Back 8

thicker leaves, dormancy, reduced leaf area

Front 9

The strength of osmotic pressure across a membrane is a function of the

Back 9

difference in water concentration

Front 10

what are two ways that scorpions conserve water?

Back 10

-reducing their metabolic rate

-burrowing into moist soil

Front 11

equation for relative humidity

Back 11

(water vapor density/saturation vapor density) x 100

Front 12

the ability of water to do work is dependent on the ____ energy content, moving from a position of higher ____ energy to a position of lower ____ energy

Back 12

free; potential;potential

Front 13

In general, you would expect plants from wetter areas to have a ____ ratio of leaf area to root area as compared to plants from drier areas

Back 13

greater

Front 14

What three things would be regulated by an organism through the process of osmoregulation

Back 14

water, anions, and cations

Front 15

Three ways Saguaro cacti conserve water

Back 15

-minimizing exposure to sun

-insulating itself from the sun

-closing stomata

Front 16

Rank the sites in order of evaporative water loss from greatest to lowest for kangaroo rats

Back 16

moist, intermediate, dry

Front 17

In a hypoosomtic organism, water will tend to flow _____ the organism, while salts will tend to flow ____ the organism

Back 17

out of; into

Front 18

What is the cost to aquatic animals for being isoosmotic with the surrounding water?

Back 18

Maintaining solute gradients

Front 19

Ehleringer found that plants using deep ground water tended to have deuterium:hydrogen ratios closer to ____ precipitation, while plants with shallower roots were closer to ____ precipitation

Back 19

winter; summer

Front 20

(T or F) Because freshwater fish are hyperosmotic, they compensate by drinking large amounts of water

Back 20

false

Front 21

which of the following is a source of water intake for kangaroo rats?

Back 21

metabolic and food moisture

Front 22

Pure water has a potential of ____ while most environmental water has a potential that is ____

Back 22

0; negative

Front 23

In stable isotope analysis, the critical measurement is the _____ each of the isotopes in the sample

Back 23

relative amount of

Front 24

Soil water moves ____ a gradient of water potential

Back 24

down