Chapter 3: Ecosystems

The study of how organisms interact with one another and with their nonliving environment
Levels of organization of matter in nature (5 levels):
Organisms, Populations, Communities, Ecosystems, Biosphere
any form of life
Groups of organisms that resemble one another in appearance, behavior, chemistry, and genetic makeup
How many species on plant earth?
10-15 million
Why are microbes key to keeping our population alive?
Microbes convert nitrogen gas in the atmosphere into forms that plants which produce foods (cheese, tofu)
A group of interacting individuals of the same species occupying a specific area
(populations) genetic diversity:
Individuals vary slightly in their genetic makeup, which is why they do not look alike or act alike
The place where the population lives
Distribution or range:
The area at which you find species
Community (biological)
All the populations of different species that live and interact in a particular area.