Energy!
All organisms need energy. Where does this energy ultimately come from?
What is the sun?
TRUE or FALSE: Populations can grow exponentially forever!
What is false?
A relationship in which both organisms benefit from the interaction (+/+).
What is mutualism.
This term refers to groups of individuals that belong to the same species and live in the same area.
What is a population?
TRUE or FALSE: Human population growth generally has a positive effect on ecosystems in terms of their growth and stability.
What is false?
Give an example of a consumer.
What is an animal (herbivore, omnivore, carnivore), or decomposer?
This type of population growth is characterized by an S-shaped graph.
What is logistic growth?
A relationship in which two organisms compete for the same limited resource, causing both to be negatively affected (-/-).
What is competition?
This term refers to groups of different populations that live together in a defined area.
What is a community?
TRUE or FALSE: Symbiotic relationships are close, short-term biological interaction between two (2) different species.
What is false? (Symbiotic relationships are close, LONG-term biological interactions.)
Give an example of a producer.
What is a plant, cyanobacteria, phytoplankton.
How is carrying capacity usually represented in a formula? (i.e. what variable do we use?)
What is K?
A relationship in which one organism benefits while the other is harmed (-/+).
What is parasitism?
This is a network of interconnected food chains that shows the feeding relationships and flow of energy among organisms in an ecosystem.
What is a food web?
At what tropic level would you find an apex preditor?
What is tertiary or quaternary (the highest level in the ecosystem)?
Energy transferred between trophic levels is typically only ___% efficient.
What is 10%?
This term refers to a factor or condition that causes population growth to slow or decrease.
What is a limiting factor?
A relationship in which one organism benefits while the other is neither helped nor harmed (+/0).
What is commensalism?
This is a species that has a large impact on its ecosystem relative to its abundance. Removing a _______ species can cause major changes in the ecosystem and affect many other organisms.
What is a keystone species?
TRUE or FALSE: The more biodiverse a community is, the more resilient it will be to environmental change.
What is true?
Primary producers (autotrophs) only absorb about ___% of the energy emitted from the sun.
What is 1%?
This type of population growth is characterized by a J-shaped graph.
What is exponential growth?
A relationship in which one organism is harmed while the other is unaffected (-/0)
What is amensalism?
This is a non-native species that spreads into a new ecosystem and causes harm to native species, habitats, or ecosystem processes.
What is an invasive species?
Why don't we usually see more than five (5) tropic levels in an ecosystem?
There is not enough energy to support that many tropic levels.