A community of living organisms of all different species interacting with one another and the physical and chemical factors of their nonliving environment
What is an ecosystem?
The process occurring at "C" in this diagram of the water cycle.

What is transpiration?
In this diagram, this letter accurately depicts the punctuated model of evolutionary change.

What is C?
The amount of energy that is transferred from one trophic level to another in a food chain.
What is 10%?
Has the highest Net Primary Productivity of any terrestrial (land) ecosystem.
What is Tropical Rainforest?
A group of individuals of the same species occupying a given area at the same time
What is a population?
When purchasing a bag of fertilizer, such as 24-12-17, it is the middle number, in this case "17".
What is phosphate?
Has a very narrow diet, eats little variety, as in the case of a panda.
What is a specialist species?
In any transformation of energy, the lost energy is given off in this form.
What is heat?
A species that completes a role in the ecosystem that no other species completes, such as a honeybee.
What is a keystone species?
Organisms that feed on both plants and animals
What is an omnivore?
This cycle has the largest nutrient reservoir in the atmosphere.
What is the nitrogen cycle?
Often confused as "Survival of the Fittest."
What is natural selection?
In terms of matter and energy in an ecosystem, this is always recycled.
What is matter?
The species pictured here is considered one of these in North America.

What is an invasive or nonnative species?
A group of individuals of different species occupying the same space at the same time.
What is a community?
The burning of fossil fuels is amplifying the greenhouse effect in this cycle.
What is the carbon cycle?
When one species has two populations that become separated over a long period of time due to some obstruction such as a mountain, ocean or continental movement which leads to the development of two new species.
What is geographic isolation?
In this diagram, these are the primary consumers.

What are the Grasshopper, Rabbit, and Mouse?
The niche of the living animals seen here.

What is detritus feeder?
An osprey that feeds on a rabbit that feeds on clover
What is a secondary consumer?
In the Nitrogen Cycle, it is the process occurring at location A.

What is denitrification?
When humans breed animals or plants so that they exhibit the traits that we desire.
What is Artificial Selection?
In this diagram of a food chain, this is the number of kcal available to the eagle.
What is 10 kcal?
Although both saprotrophs, detritus feeders are different than decomposers for this reason.
What is that detritus feeders have a mouth?