Unit A - Section 1

A group of organisms that have the same structure and can reproduce with one another

Refers to all types of organisms on earth

In an ecosystem living things interact with other living and non living things in a shared environment

When members of a species live in a specific area and share the same resources, these individuals form a population

When populations of different species live in the same area form an community

biological classification ranking between family and species

Another type of interdependence is called symbiosis (sym meaning together; biosis meaning living) which is an association between members of different species

One of the participating organisms benefits but the other does not. However there’s no harm done to the second organism

As the root word mutual suggests mutualism benefits both organisms

One organism benefits but the other one is harmed

Happens when two or more species need the same resource

The term niche describes the role of an organism within the ecosystem.

An organisms niche describes what it eats, and what eats it. It’s habitat, nesting site or range. And the affect on both the populations

Dividing up the resource among them what is known as resource partitioning. Doesn’t always involve food.

Variation within a species is called variability

Natural selection is when the environment selects which individual will survive long enough to reproduce