BIOL 101 QUESTIONS AND ANSWERS EXAM LATEST
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Exploitative
When one organism uses up resources and therefore another one cannot.
Eating all the food in one area.
Biome
Large community type that occupies a specific region.
Often defined by dominant plat types.
Age structure
Influence population growth rates
Realized Niche
Role that organism actually fills due to competition and environmental pressures.
Secondary Succession
Initiated by the disruption of a previously existing community.
Fire, hurricanes, grazing, human disturbances.
Tropical Rainforest
Between 10 degrees N and S, >250mm rain per year
Cover 11% of land, make up 30% of productivity.
Diversity is high (300spp/100m^2)
Lichens
Bare rock.
Slowly break down rock and moss gross and dies building up the thinnest layer of soil.
Geometric Growth
Nt+1 =(Nt)(2)
N=number of individual
2= growth rate
t=time
"J" shaped curve
Temperate Rainforest
Often in maritime climates.
Cool, lots of winters rain and summers fog.
productivity + decomposition is very high.
Contains some of the tallest, largest trees.
Other Population Growth Factors
Age distribution
Sex ratios
Population Density
Tundra
, Too cold for the tree growth.
Little annual precipitation.
Plants are short in stature.
Soil is underlain by permafrost.
Mutualism
Interactions between two organisms in which both benefits.
Insectivorous birds and large mammals.
Pollinators and flowers.
Mycorrhizal fungi and plants.
Taiga
Swampy coniferous forest in high latitudes.
Slightly warmer, so some hardy trees can survive.
Still same permafrost.
Ecosystems
All populations and communities and communities within an area, but also antibiotic
aspects as well (rainfall, temperatures, disturbances).
Food chains and food webs tracks movement of energy through a system.
Main ultimate source of almost all food webs is the sun.
Density Independent Factors
Sometimes called a limiting factor.
Are not affected by population size (independent).
Most often are natural disasters.
Community
Groups of organisms (different species) living in the same place at the same time.
Does not include abiotic factors.
Commensalism
One species benefits and the other is neither harmed nor benefitted.
Epiphytic plants and trees.
Jackals and tigers.
Catte egrets and Cattle.
Producers
Plants and algae are the base of the food web.
Produce the energy that enters the system through photosynthesis.
Amensalism
Interaction where one organism is negatively affected but the other is not affected.
Penicillin and bacteria.
Algal blooms and everything else.
Temperate Deciduous
Mainly the Northern Hemisphere.
Warm, moist summers and cold winters.
Trees lose leaves over winter and smaller plants die back.
No permafrost, young soils from glaciers.
Population Density
Number of individuals within a specific area (potential mates).
DP=N/A
UPDATE.Buy Quality Materials!
Exploitative
When one organism uses up resources and therefore another one cannot.
Eating all the food in one area.
Biome
Large community type that occupies a specific region.
Often defined by dominant plat types.
Age structure
Influence population growth rates
Realized Niche
Role that organism actually fills due to competition and environmental pressures.
Secondary Succession
Initiated by the disruption of a previously existing community.
Fire, hurricanes, grazing, human disturbances.
Tropical Rainforest
Between 10 degrees N and S, >250mm rain per year
Cover 11% of land, make up 30% of productivity.
Diversity is high (300spp/100m^2)
Lichens
Bare rock.
Slowly break down rock and moss gross and dies building up the thinnest layer of soil.
Geometric Growth
Nt+1 =(Nt)(2)
N=number of individual
2= growth rate
t=time
"J" shaped curve
Temperate Rainforest
Often in maritime climates.
Cool, lots of winters rain and summers fog.
productivity + decomposition is very high.
Contains some of the tallest, largest trees.
Other Population Growth Factors
Age distribution
Sex ratios
Population Density
Tundra
, Too cold for the tree growth.
Little annual precipitation.
Plants are short in stature.
Soil is underlain by permafrost.
Mutualism
Interactions between two organisms in which both benefits.
Insectivorous birds and large mammals.
Pollinators and flowers.
Mycorrhizal fungi and plants.
Taiga
Swampy coniferous forest in high latitudes.
Slightly warmer, so some hardy trees can survive.
Still same permafrost.
Ecosystems
All populations and communities and communities within an area, but also antibiotic
aspects as well (rainfall, temperatures, disturbances).
Food chains and food webs tracks movement of energy through a system.
Main ultimate source of almost all food webs is the sun.
Density Independent Factors
Sometimes called a limiting factor.
Are not affected by population size (independent).
Most often are natural disasters.
Community
Groups of organisms (different species) living in the same place at the same time.
Does not include abiotic factors.
Commensalism
One species benefits and the other is neither harmed nor benefitted.
Epiphytic plants and trees.
Jackals and tigers.
Catte egrets and Cattle.
Producers
Plants and algae are the base of the food web.
Produce the energy that enters the system through photosynthesis.
Amensalism
Interaction where one organism is negatively affected but the other is not affected.
Penicillin and bacteria.
Algal blooms and everything else.
Temperate Deciduous
Mainly the Northern Hemisphere.
Warm, moist summers and cold winters.
Trees lose leaves over winter and smaller plants die back.
No permafrost, young soils from glaciers.
Population Density
Number of individuals within a specific area (potential mates).
DP=N/A
