The first type of species that populates an ecosystem after a disturbance occurs
What is the pioneer species
100
All of the genes in a population
What is a gene pool
100
The 'levels' in an ecosystem through which energy flows
What is a trophic level
100
The second most abundant gas in the atmosphere
What is oxygen
200
As cheetahs get faster, gazelles begin getting more agile over subsequent generations. This is an example of...
What is co-evolution
200
Two resources that producers compete for during succession
What is sunlight and soil nutrients
200
A requirement for a species to evolve
What is genetic variation
200
This depicts the different trophic levels and the energy how energy is lost as it goes up trophic levels
What is an energy pyramid
200
The element from fertilizer that is most responsible for eutrophication
What is phosphorus
300
A group of species living in the same area at the same time
What is a community
300
A change to an ecosystem that leads to primary succession
What is a disturbance
300
The expression of DNA in an individual organism
What is a phenotype
300
This is the process by which organisms use oxygen to convert glucose to carbon dioxide, water and energy
What is cellular respiration
300
The layer of the atmosphere that contains the ozone layer
What is the stratosphere
400
A terrestrial biome that absorbs the most carbon dioxide from the atmosphere is:
What is the tropical rainforest
400
The pioneer species in secondary succession
What is lichens or moss
400
An inherited trait that increases an organism's chance for survival
What is an adaptation
400
This is the type of organism that breaks down dead organisms and return nutrients to soil
What is a decomposer
400
The type of power that is generated by splitting the nuclei of atoms
What is nuclear fission
500
An owl consumes prey from a grassland habitat that contains 30,000 Calories of energy. If the owl ate a rat that ate insects that ate grass, then how many Calories has the owl gained?
What is 300 Calories
500
The species that comprise the final stage of succession
What is the climax community
500
A strain of bacteria becomes immune to antibiotics is an example of this
What is resistance
500
The top trophic level in an ecosystem
What is a quaternary consumer or top predator
500
The type of energy that is generated by using decomposing waste to create methane gas