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Biology 1050 Final Exam Study Questions and Correct Answers

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  • Course
  • BIO 1050
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  • 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...

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  • September 2, 2024
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  • BIO 1050
  • BIO 1050
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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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