PBIO 1000 EXAM 2 QUESTIONS WITH VERIFIED ANSWERS
How will global warming affect the planet beyond our economic concerns? - Answers -
Climate change threatens many of the world's ecosystems and species; drought,
flooding, fire, insect invasions, spreading diseases?
How does climate change threaten the Everglades? reason 1 - Answers - with hotter
and drier climate the Everglades would be faced with more frequent fires, and it is not
adapted to tolerate fire
How does climate change threaten the Everglades? reason 2 - Answers - If warming
global temperatures melt glaciers, and the Greenland ice sheet, the melt water added to
the oceans would raise sea levels, and this would flood the Everglades with sea water
Law that can protect everglades - Answers - Endangered Species Act. (ESA, signed
into law 1973)
Endangered Species Act (ESA) - Answers - Prohibits, by law, any human activity that
threatens an animal listed on the US Federal Endangered Species list!
The Klamath River - Answers - protects bald eagles
stopped damming because birds need to drink the water
Problem with water - Answers - wildlife needs the water to survive
farmers need the water to farm
in dry years they compete
who wins when both farmers and animals - Answers - the animals
Northern spotted owl - Answers - needs forest to raise young
tried to stop logging
result: restricted logging in 24 mil acres
indiana bats - Answers - bats need the forest
so it would stop logging
in oregon area
Are plants equally protected by the ESA - Answers - No, Plants do not move, thus on
private property they are considered the property of the landowner, not public property
as animals would be, and so are not legally protected by same argument.
species - Answers - breeds
breeds in the wild
, has fertile offspring
who gets less protection plants or animals - Answers - plants
How does ESA protect plants - Answers - By setting aside habitat for animals on the list,
and indirectly helping some plants survive
Subsistence Farming - Answers - growing enough to live, but very little surplus to sell
how much of the USA budget goes to food - Answers - 10%
how do we have less farmers but more food - Answers - more machines
agricultural inputs - Answers - 1. Fertilizers
2. irrigation
3. Herbicides
4. pesticides
Norman Borlaug - Answers - researched making food in mexico because it was closest
poor country
What did Borlaug do with wheat - Answers - the plants grew too tall and fell over so he
cross bread the pants (1. mid west US wheat 2. Tropical mexican wheat 3. japanese
dwarf varieties)
Alien species - Answers - organisms that have been moved from their native home to
another place
Invasive species - Answers - when alien organisms take over their new home and
replace native plants and animals
cane toad - Answers - brought to australia to eat beetle
killed all other animals though because its poisonous
Prickly pear cacti - Answers - came to australia in 1800s
spread over millions of acres
stopped by cactoblastis
cactoblastis - Answers - used to stop prickly pear cacti
brought to Caribbean
infested florida and threatened 60 species
Water Hyacinth - Answers - from brazil introduced to US in 1880
used as a pond plant pretty flowers
prevented sunlight from going to other plants
prevents waves and oxygen from getting to water
How will global warming affect the planet beyond our economic concerns? - Answers -
Climate change threatens many of the world's ecosystems and species; drought,
flooding, fire, insect invasions, spreading diseases?
How does climate change threaten the Everglades? reason 1 - Answers - with hotter
and drier climate the Everglades would be faced with more frequent fires, and it is not
adapted to tolerate fire
How does climate change threaten the Everglades? reason 2 - Answers - If warming
global temperatures melt glaciers, and the Greenland ice sheet, the melt water added to
the oceans would raise sea levels, and this would flood the Everglades with sea water
Law that can protect everglades - Answers - Endangered Species Act. (ESA, signed
into law 1973)
Endangered Species Act (ESA) - Answers - Prohibits, by law, any human activity that
threatens an animal listed on the US Federal Endangered Species list!
The Klamath River - Answers - protects bald eagles
stopped damming because birds need to drink the water
Problem with water - Answers - wildlife needs the water to survive
farmers need the water to farm
in dry years they compete
who wins when both farmers and animals - Answers - the animals
Northern spotted owl - Answers - needs forest to raise young
tried to stop logging
result: restricted logging in 24 mil acres
indiana bats - Answers - bats need the forest
so it would stop logging
in oregon area
Are plants equally protected by the ESA - Answers - No, Plants do not move, thus on
private property they are considered the property of the landowner, not public property
as animals would be, and so are not legally protected by same argument.
species - Answers - breeds
breeds in the wild
, has fertile offspring
who gets less protection plants or animals - Answers - plants
How does ESA protect plants - Answers - By setting aside habitat for animals on the list,
and indirectly helping some plants survive
Subsistence Farming - Answers - growing enough to live, but very little surplus to sell
how much of the USA budget goes to food - Answers - 10%
how do we have less farmers but more food - Answers - more machines
agricultural inputs - Answers - 1. Fertilizers
2. irrigation
3. Herbicides
4. pesticides
Norman Borlaug - Answers - researched making food in mexico because it was closest
poor country
What did Borlaug do with wheat - Answers - the plants grew too tall and fell over so he
cross bread the pants (1. mid west US wheat 2. Tropical mexican wheat 3. japanese
dwarf varieties)
Alien species - Answers - organisms that have been moved from their native home to
another place
Invasive species - Answers - when alien organisms take over their new home and
replace native plants and animals
cane toad - Answers - brought to australia to eat beetle
killed all other animals though because its poisonous
Prickly pear cacti - Answers - came to australia in 1800s
spread over millions of acres
stopped by cactoblastis
cactoblastis - Answers - used to stop prickly pear cacti
brought to Caribbean
infested florida and threatened 60 species
Water Hyacinth - Answers - from brazil introduced to US in 1880
used as a pond plant pretty flowers
prevented sunlight from going to other plants
prevents waves and oxygen from getting to water
