Levels of Organization 18.1

Imagine this… You want to buy some bread. Where do you go for bread? Most would say the bread aisle in a grocery store. You want to buy some bread. Where do you go for bread? Most would say the bread aisle in a grocery store. What if the grocery store was not organized in aisle’s? How would you find the bread? What if the grocery store was not organized in aisle’s? How would you find the bread? What if stores were not specific? How would you know what store to go to? What if stores were not specific? How would you know what store to go to?

Branches of Biology Just like our stores, Living things come in a variety of shapes, sizes, and habits. Just like our stores, Living things come in a variety of shapes, sizes, and habits. No single biologist could know where everything is so it is divided up into different fields. No single biologist could know where everything is so it is divided up into different fields. Zoologists study animals Zoologists study animals Botanists study plants Botanists study plants Paleontologists study ancient life forms Paleontologists study ancient life forms

Levels of Organization Living things are also put into different levels of Organization. Living things are also put into different levels of Organization. Just like this… Just like this… You live in America You live in America You live in IL You live in IL You live in a city You live in a city You live in a neighborhood You live in a neighborhood In your neighborhood is your house In your neighborhood is your house In your house is your room. In your house is your room.

The Biosphere This is the part of the Earth where all living things are found This is the part of the Earth where all living things are found The biosphere contains all of the ecosystems on earth The biosphere contains all of the ecosystems on earth

Ecosystem Where a community of living things and its nonliving surroundings are found. Where a community of living things and its nonliving surroundings are found. Biotic Abiotic

Biotic Vs. Abiotic Biotic- living factors in the environment Biotic- living factors in the environment Abiotic- nonliving parts of the environment Abiotic- nonliving parts of the environment

Community Populations that live together in a defined area Populations that live together in a defined area Basically all the living things in one area. Basically all the living things in one area. Living

Population Group of organisms of one type that live in the same area Group of organisms of one type that live in the same area All the same type of fish

Organism One individual living thing One individual living thing

And they get even smaller We can break things down even further to We can break things down even further to Groups of different cells Groups of different cells Tissues, organs, and systems Tissues, organs, and systems Cells Cells Smallest functional unit of life Smallest functional unit of life Molecules Molecules Groups of atoms Groups of atoms