test 4
Eluviation is a strong component of ____ soil horizon
E
The nature of the solid core is studied using refraction and time delay information from ____ passing through it.
P waves
Which is true?
Soils modify vegetation growth Animals modify soil development vegetation modifies soil development
We can estimate the density of the earth using ____
deep rock samples and earth's mass and size
in aquatic environments, about 10-15% of eaten material is used for growth in ____.
herbivores and carnivores
Animals in different habitats in the same zoogeographic realm differ because of ____.
naTURAl selection
California has all biomes except ____.
tropical rainforest
Soil distributions are highly related (correlated) to ____.
climate
____ biomes often have winter rainfall and summer drought.
mediterannean scrub
____ has the most field capacity.
silt clay loam
The solum is the ___.
A through B
Climate affects soil ____
E horizon formation soil acdity soil depth over time no answers are true soil weathering
Before photosynthesis, the ____ horizon did not exist.
O
____ changes the soil characteristics (e.g. soil type) in a soil catena.
Water infiltration, transport and deposition
Plants have ____ in a zone of physiological stress.
a low population
Clay accumulation, but not calcium carbonate or gypsum in the B horizon is consistent with ____ formation.
alfisols
The Dust Bowl in the 1930's is understood in terms of ____
climate, weather and land use
Species living in one habitat in a geographic realm are different from species in a similar habitat of a different geographic realm because of ____.
convergent evolution
Carbon storage from the atmosphere to the earth's crust, plants, soil, and marine sediments requires ____.
photosynthesis
Conversion of carbon dioxide and water into sugars and oxygen involves ____.
photosynthesis
The rate of photosynthesis is influenced by ____.
relative humidity temperature recent rainfall
Taiga is most likely to have ____ below it.
spodsols
Mild winters are a hallmark of many____ biomes.
temperate deciduous rainforest
____ is most permeable
sand
Soils in ____ climates are more likely to be neutral
semi-arid (steppe, BS)
Illuviation is common in soil horizon ____.
B
The production of herbicides by sage to suppress other plant growth is an example of ____.
amensalism
____ are caused by pyroclastic flows and volcanic ash fall.
andisols
Primary succession involves growth of ____.
annual vegetation growing on bare soil
The longest long-term storage in the carbon pool is found in the ____.
crust
The Moho (Mohorovicic) Discontinuity separates the ____.
crust and lithosphere
Continental crust is primarily made of ____.
feldspar and silica
Island species vary based on
island size distance to mainland variety of niches
The asthenosphere is ____.
plastic
Translocation occurs in the ____ soil horizon.
all horizons
____ are associate with bogs, but not tundra.
histosols
The region within which a species operates most effectively adapted is called its ____.
niche
Oceanic crust is ____ than continental crust
denser and thinner
___ developed one of the two lines separating Indomalayan and Australian zoogeographic realms.
Alfred weber
Biogeography is the combination of ____.
phytogeography and zoology