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AGRONOMY 370 FINAL EXAM WITH CORRECT ANSWERS -7
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AGRONOMY 370 FINAL EXAM WITH CORRECT ANSWERS -7
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AGRONOMY 370 FINAL EXAM WITH CORRECT ANSWERS #7How would you define grassland ecology? - correct answer the study of grasslands,
which are biomes dominated by herbaceous plants, and their interactions with other
organisms. These interactions embody the "ecology" part of grassland ecology. Another
way to put it is the study of different organisms and their interactions in their grass-
dominated environments.
What is an example of a "provisioning" ecosystem service? - correct answer food
security
What is an example of a "regulating" ecosystem service? - correct answer climate
stability
What is an example of a "supporting" ecosystem service? - correct answer productive
soil
What is an example of a "cultural" ecosystem service? - correct answer inspirational
landscapes
What is the spirit of aldo leopold's land ethic? - correct answer caring for the land is
caring for ourselves
Plant fossil evidence indicates grasses present mostly after 65 million years ago in the
wake of a planetary cataclysm that caused the 5th extinction (t/f) - correct answer true
(earliest evidence for grasses 100+ mya, but evidence for grasslands is 30-50 mya)
Why did grasslands emerge? - correct answer probably a combination of dry conditions,
increased silica in soils, frequent defoliation, and decreased atmospheric co2
What works best for c3 photosynthesis? - correct answer cool-season plants, best at
50-70 degrees f; competitive advantage when below-ground resources are abundant
What works best for c4 photosynthesis? - correct answer warm-season plants, best at
70-90 degrees f; higher water and nitrogen use efficiency
What is the purpose of meristematic tissue at the base of plants? - correct answer
allows plants to re-grow rapidly after defoliation
What is the purpose of silica bodies in cell walls? - correct answer allows plants to
tolerate herbivory
When did prairies and savannas appear in wisconsin? - correct answer ~3,000 years
before present
, When is there evidence that glacier had receded from southern wisconsin? - correct
answer ~17,000 years before present
What is the area of sw wisconsin, nw illinois, ne iowa, se minnesota that was not
glaciated during the last glacial event - correct answer driftless area
Variation in the spatial and temporal distribution of roots among grassland taxa allows
for ___? - correct answer niche partitioning
What does niche partitioning result in? - correct answer more thorough and complete
use of below-ground resources and promotes species diversity
What is bunch-forming grass? - correct answer tillers of a plant clustered together and
connected at the base
What is sod-forming grass? - correct answer tillering primarily from below-ground
rhizomes and above-ground stolons
What is annual grass? - correct answer populations maintained mainly via sexual
reproduction from seed each year
What is perennial grass? - correct answer populations maintained mainly via asexual
clonal growth of tillers
What is the philosophy of mishkos kenomagwen? - correct answer respect the plant and
the plant will take care of you; all of our flourishing is mutual
What does "take half, leave half" mean? - correct answer scientific finding for how to
stimulate subsequent grass growth
What is the role of experiments? - correct answer listening and translating knowledge of
other beings
What do grass leaves have? - correct answer thick cell walls (to help them stand up to
wind and trampling), phytoliths (made of si that help reduce herbivory), and parallel
veins (because they're monocots)
What is the basic unit of a grass plant? - correct answer phytomer
What is the phytomer comprised of? - correct answer blade, collar, and sheath attached
to the stem at nodes
What allows stem elongation to occur? - correct answer intercalary meristematic tissue
What is the stem of the grass plant known as? - correct answer tiller
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