Ecology Quiz 2
_____ of the earth's land surface is covered by desert.
20%
By 1992, most of Texas and all of Massachusetts had less than ____% natural vegetation remaining.
25%
You have captured and weighed 11 deer with the following individual weights (in kg): 23, 27, 35, 42, 26, 35, 44, 33, 22, 23 and 38. The sample mean of the data is:
31.6
There are(is) _______ convective air cell(s) per hemisphere, _______ total for the earth.
3;6
Boreal forest are found between _________ latitude
50 and 65* North
Which of the following would be considered a novel ecosystem?
A cotton field that has not been worked for 20 years, Hawaiian forests growing on lava flows dominated by albizia and Australian ironwood, A pine plantation in northern Alabama abandoned in 2000 because of infestation by pine bark beetles, A bottomland hardwood forest in Texas supporting approximately 10,000 feral hogs
All of the following components influence soil structure except
Age
The _______________ is a depositional horizon that contains clays, humus, and other materials which may form distinct banding patterns.
B horizon
Which of the following biomes have fertile soils that contain large quantities of organic matter?
Both temperate forest and temperate grassland
What is the deepest soil layer?
C horizon
As latitude increases, temperature decreases likewise as lastitude decreases, temperature decreases.
False
In a typical soil profile the highest level of biological activity is supported by the C horizon
False
Mycorrhizae are parasitic fungi that are depleting tropical trees of nutrients.
False
Taigas have moderate temperatures with occasional droughts.
False
All of the following statements concerning wind are true except
North east toward the poles
Which of the soil horizon is made up of freshly fallen organic matter including whole leaves, twigs, and other plant parts?
O horizon
Which of the following soil horizon profiles is ordered correctly?
O, A, B, C
Which of the following is not a characteristic of the boreal forest?
Sparce plant cover
What is Earth's climatic variation due to?
Spherical shape of earth, earth's axial rotation as it orbits the sun, uneven heating of earth's surface
A sample mean is a statistical estimate of the true population mean
True
Environments located at low latitudes at high elevations have similar climates as those environments located at high latitudes.
True
The mean height of a sample of 100 seedlings would likely closer to the true population mean then the mean of a sample of 11.
True
The percipitation in moist temperate regions is caused by the mating of cool polar air and warm subtropical air.
True
Tradewinds move towards the equator.
True
Freezing and thawing brings stones to the surface, forming a netlike, or polygon pattern on the surface of the _________ soils.
Tundra
What do climatic diagrams provide?
Wind patterns, average minimum temperature above and below 0*C, temperature and percipitation variations, wet and dry seasons
The Northern and Southern Hemispheres receive approximately equal amounts of solar radiation on the
both spring equinox and autumnal equinox
Warm tropical air
cools as it ascends
As elevation increases, mountain climates are characterized by
decreasing temperature and increasing percipitation
Recently human intrusion has increased on the tundra. How is the tundra being impacted by humans?
intense oil exploration and extraction
During the northern winter, the Northern Hemisphere
is tilted away from the sun
Which of the following is true of fire in the tropical savannah
it kills young trees
The corolis effect causes an apparent deflection of winds in the southern hemisphere to the ________ of the direction of travel
left
Most of the earth's deserts are
located at 30* north and south latitudes.
Following Ellis & Ramankutty's anthropogenic biome classification, most of the area within 100 mile radius of Lubbock would best be described as
residential and populated irrigated cropland, embedded in remote cropland and surrounded by remote rangelands
The biomes which have experienced the greatest percentage conversion by man is
temperate grasslands, savannas and shrublands
Which of the following is the correct order from the longest to the shortest growing season?
tropical rain forest, tropical dry forest, boreal forest, tundra
Heating of the earths surface causes
warm air to rise and cool air to sink