Unit B Ashley and Tori Flashcards
What is ecology?
The study of an ecosystem
What is an ecotone?
A transition area
What are the four terrestrial biomes?
Tundra, Taiga, Temperate Deciduous Forests and Grassland
What is a eutrophic lake?
A lake that eventually fills in and becomes dry land
What is biotic potential?
The maximum number of offspring that a species could produce if resources were unlimited
What is carrying capacity?
The amount of organisms an ecosystem can sustain
What is the difference between a density-dependent factor and a density-independent factor?
Density-independent is a factor that will happen regardless, such as fire or flood. A dependent factor would be a way to control such as disease and food shortage
What are the three forestry practises?
Slash and burn, clear cutting and selective cutting
What is a prescribed burn?
A controlled fire set intentionally in a designated area
What causes eutrophication?
Fertilizer and waste cause plant/algae growth to increase, thus depleting oxygen from water and causing the bottom to fill
What is biological oxygen demand?
The amount of dissolved O2 needed by decomposers to completely breakdown organic matter in a water sample at 20 degrees Celsius over 5 days
What are four factors that affect aquatic environments?
Chemical environment, temperature and sunlight, water pressure and seasonal variation
What are the four levels of soil?
Leaf litter, topsoil, subsoil and bedrock
What are the three zones of a lake?
Littoral (shallow), limnetic (open water), profundal (deep)
What is the difference between a population and a community?
Population is of one species while a community is multiple species living together
What are the 6 kingdoms?
Monera, Protista, fungi, plantae and animalia
What is phylogeny?
The history of the evolution of a species
What is indirect evidence for evolution?
Geographic distribution, comparative anatomy, behaviour, breeding and biochemistry
What is Palaeontology?
The study of fossils
What is radio metric dating?
Technique used to determine the age of rocks and fossils by measuring half lives
What is biogeography?
Geographic distribution of life on earth
What present age dies after an animal dies?
50% (half life)
Homologous
Features with similar structure but different function
Analogous
Same structure same function but different origin
