It is the study of the relationships between organisms and the living and nonliving parts of the environment.

(a)  

It is the smallest unit of life that can still respond to its environment, self-replicate, and perform all other biological functions.

(a)  

It is the variety of life on Earth and the essential interdependence of all living things.

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At this zone, the levels of the factor are too high or too low. The population barely survives.

(a)  

It describes the process where individuals with certain genes survive and reproduce more successfully than others.

(a)  

This can occur when natural selection favors unrelated organisms to evolve to look similar.

(a)  

It is the state where the population will continue to grow, eventually exceeding the carrying capacity.

(a)  

It is the relationship between organisms when one benefits while the other is unaffected.

(a)  

It refers to the movement of matter within or between the ecosystem.

(a)  

It is the circulation of sulfur in various forms through nature.

(a)  

It shows the continuous movement of water within the Earth and atmosphere.

(a)  

It shows all of the food chains within a community interwoven together.

(a)  

These type of organisms break down dead or decaying matter.

(a)  

It is any self-regulating process by which an organism tends to maintain stability while adjusting to conditions that are best for its survival.

(a)  

It is the maximum population that the ecosystem can sustain.

(a)  

It works on the same principal as natural selection, but with humans driving the selection process.

(a)  

It is when a population splits and become two different species.

(a)  

Each organism has a particular type of environment where it can survive.

(a)  

It is the part of Earth that supports life-- all ecosystems are found here.

(a)