Exam #4

Front 1

__________ occurs when a plant wilts, and cannot recover when placed in a saturated atmosphere

Back 1

permanent wilting point

Front 2

More than 90% of a living plant is composed of which elements?

Back 2

carbon, hydrogen, and oxygen

Front 3

Which of the following statements is NOT true for hydroponic growing systems?

Back 3

Nutrient film technique grows plants on a large tank on a thin, porous film

Front 4

The force of attraction between two like molecules (such as water and water) is called:

Back 4

cohesion

Front 5

The loss of water through special openings (not stomata) in the leaves is called:

Back 5

guttation

Front 6

__________ is the amount of water the soil can hold against the force of gravity.

Back 6

field capacity

Front 7

A vertical section of soil extending through all its horizons from the surface to the parent material is known as:

Back 7

a soil profile

Front 8

When the south pole is titled toward the sun and the sun rays hit the tropic of a capricorn at a 90 degree angle:

Back 8

winter solstice

Front 9

The two largest terrestrial biomes in the world are:

Back 9

Coniferous forest and tundra

Front 10

This biome supports a low number of plant species, receives little rain, and plants have shallow root zones due to permafrost and wet soil.

Back 10

arctic tundra

Front 11

A rain shadow is what area?

Back 11

The side of a mountain range and beyond dominated by dry air masses

Front 12

This biome is found on five continents with plants that look similar but are not related.

Back 12

deserts and xeric shrublands

Front 13

Most of the temperate grasslands in the northern hemisphere have been converted to:

Back 13

Crop land for grains

Front 14

This biome receives ample rainfall, has annual temperatures from 5C to 20C, and is home to spruce, fir, pine, hemlock and redwood.

Back 14

temperate coniferous forest

Front 15

Population size is affected by:

Back 15

All affect population size

Front 16

Wetlands are important ecosystems because they:

Back 16

Are all functions of wetlands

Front 17

Which of these is NOT an example of mutualism:

Back 17

Epiphytes

Front 18

Herbivory is a common example of:

Back 18

predation

Front 19

Conservation Biology

Back 19

All are components of conservation biology

Front 20

Nitrogen (N) is used by the plant as a component of:

Back 20

chlorophyll and nucleic acids

Front 21

Top soil is found in the __________ horizon.

Back 21

A

Front 22

The pressure flow hypothesis does NOT explain:

Back 22

How osmosis works

Front 23

Active transport of molecules across membranes occurs through:

Back 23

proton pumps

Front 24

The correct order of wind systems between the equator and each pole is:

Back 24

Trade winds, Westerlies, Arctic winds

Front 25

This biome is dominated by trees such as oak, elm, poplar, beech and maple and is desirable for human settlement and agricultural production.

Back 25

temperate broadleaf and mixed forest

Front 26

When the north pole is tilted toward the sun and the sun rays hit the tropic of cancer at a 90 degree angle:

Back 26

summer solstice

Front 27

How many systems or belts of surface winds in each hemisphere determine the patterns of precipitation and vegitation?

Back 27

3

Front 28

Climate in an area is primarily dependent on:

Back 28

Amount of sunlight

Front 29

Ecological succession occurs in:

Back 29

all ecosystems

Front 30

Weltands are found in:

Back 30

all are places where wetlands occur

Front 31

Ecologists characterize species richness by the r/K selection theory. Which is NOT a trait of K selected populations?

Back 31

Reproduce rapidly and early

Front 32

Chlorosis is __________ of the leaves.

Back 32

yellowing

Front 33

The pressure flow hypothesis does NOT explain:

Back 33

How osmosis works

Front 34

Which of the following is NOT a mechanism of ion exclusion from plant cells?

Back 34

Nucleic acid movement of toxins out of the cell

Front 35

Which of the following applies to soil horizons?

Back 35

They differ in chemical, physical, and biological properties and depth.

Front 36

The cohesion theory states

Back 36

Water moves from the roots into the leaves due to negative pressure from transpiration

Front 37

Weather patterns are affected by:

Back 37

All affect the weather pattern

Front 38

Atmospheric conditions experienced at a particular time:

Back 38

weather

Front 39

This biome is home to the greatest number of plant and animal species

Back 39

tropical rainforest

Front 40

Population ecology studies:

Back 40

The age and geographical distribution of a population of individuals of the same species

Front 41

Myrmecophytes are:

Back 41

An example of mutualism between a plant and ants

Front 42

The carrying capacity of an environment changes with:

Back 42

The amount of resources available

Front 43

What is the LEAST LIKELY cause for habitat fragmentation?

Back 43

cooling ocean temperatures

Front 44

__________ is a nitrogen-fixing bacteria that forms a symbiotic relationship with legumes.

Back 44

Rhizobium

Front 45

Water will move into a cell when

Back 45

The surrounding solution has a lower solute potential (hypotonic-solution)

Front 46

What is NOT true for Potassium (K):

Back 46

it is often a limiting nutrient

Front 47

The prevailing atmospheric conditions of an area over a long period of time.

Back 47

climate

Front 48

Global warming is changing the geographic distribution of biomes. Which of the following statements is NOT a likely result of global warming?

Back 48

Trees will grow in Antarctica

Front 49

Most of the temperate grasslands in the northern hemisphere have been converted to:

Back 49

Crop land for grains

Front 50

The discipline of ecology studies:

Back 50

How organisms interact with each other and their environment

Front 51

Which of the following statements about succession is NOT true?

Back 51

Succession is affected only by biotic factors