Biology 1050 Final Exam Study Questions and Correct Answers
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Course
BIO 1050
Institution
BIO 1050
Greenhouse effect 1. energy from sun passes easily through the atmosphere to warm earths surface 2. some energy is reflected back toward space and escapes the atmosphere 3. Some energy is absorbed by greenhouse gases and remains trapped in the atmosphere, heating the air
Greenhouse gases Water, Ca...
Biology 1050 Final Exam Study
Questions and Correct Answers
Greenhouse effect ✅1. energy from sun passes easily through the atmosphere to
warm earths surface
2. some energy is reflected back toward space and escapes the atmosphere
3. Some energy is absorbed by greenhouse gases and remains trapped in the
atmosphere, heating the air
Greenhouse gases ✅Water, Carbon Dioxide, and Methane (1%)
Non-Greenhouse gases ✅Nitrogen and Oxygen (99%)
2 man made global warming causes ✅-burning fossil fuels
-cutting down forests
Global Warming ✅Increasing amounts of C02 in the atmosphere is causing a slow and
steady rise in the Earth's average surface temperature
Effects of Global Warming ✅-ice masses melt which raises sea level
-rain and snowfall patterns change
-increasing storm intensity
-extinctions
Households ✅40% of all U.S. greenhouse gases come from ________
Ecosystem ✅all the organisms in an area plus the physical environment
energy flow ✅passage of energy through the components of the ecosystem
Nutrient cycling ✅use and reuse of nutrients within the ecosystem
Food Chain ✅sequence of energy transfer from trophic level to trophic level
Trophic Level ✅a level of the food chain
Producers ✅photosynthetic organisms
Primary consumers ✅herbivores; feed on producers
Secondary consumers ✅carnivores; feed on primary consumers
, Tertiary consumers ✅feed on secondary consumers
Omnivores ✅Eat more than one trophic level (meat and plants)
Decomposers and detritivores ✅gain energy by breaking down waste products or dead
bodies
biomass ✅the total weight of all the living organisms in a trophic level
10% ✅Only ___ of the biomass of one trophic level can be converted into biomass in
the next trophic level
Nutrient cycling ✅nutrients are never lost from a system just move between biotic and
abiotic components
Nitrogen cycle ✅adding too much nitrogen to a system is pollution call Eutrophication
Eutrophication ✅adding too much nitrogen to a system
Biodiversity ✅the variety of life on earth
Ecosystem diversity ✅the number of ecosystems in a region
Species diversity ✅the number of species in an ecosystem
Genetic diversity ✅the number of alleles in a species
Factors that influence biodiversity ✅1. solar energy available
2. evolutionary history of an area
3. rate of disturbance
Mass extinctions ✅a large number of species become extinct over a short period of
time due to extraordinary and sudden environmental change
Background extinctions ✅occur at lower rates during times other than mass extinctions
geographic range ✅extensive vs restricted
- species restricted in their range are more vulnerable that those with extensive ranges
local population size ✅large vs small
-species with small population sizes are at increased risk of extinction
habitat tolerance ✅broad vs narrow
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