In a healthy ecosystem, populations of living things are _____________
interdependent
In a food chain ____ % of energy is passed on to the next higher level.
10
There may be __________ between organisms, because most ecosystems don't have unlimited resources.
competition
A relationship in which organisms both benefit from each other (like a cleaner fish and shark)
mutualism
An inherited trait is called an ______________.
instinct
Producers in a community _________________.
make food
What are some examples of natural causes of population decline?
drought, floods, and hurricanes
____________ is the cause of most population decline in organisms today.
Human activity
A single organism in an environment is called an_________.
individual
Organisms of the same kind living in the same environment make up a _____________.
population
In a food chain, each level of consumer eats the organism _______________
in the level below it.
Populations of organisms living together in an environment make up a _____________.
community
Living organisms and their physical environment make up an ________________.
ecosystem
A habitat is ____________________________.
a certain part of the ecosystem in which an organism lives
In an ecosystem, each population as a certain role, or ____________.
Niche
All life in an ecosystem depends on _____________, to capture the energy of the sun, change it into living tissue, and pass it on to other organisms.
producers
Consumers must _________________ to get the energy they need.
eat
A ____________ shows how consumers in an ecosystem are connected based on what they eat.
food chain
______________ break down tissues of dead organisms.
Decomposers
What is a food web?
It shows the relationship between many food chains within a single ecosystem.
What shows the amount of energy available to pass from one level of a food chain to the next?
A long relationship between different organisms that live together for most of their lives is called ____________.
symbiosis.
A behavior that is developed over time is called a ______________.
learned behavior
A population of organisms that is beginning to decline is considered ____________.
threatened
endangered