Biology: the big ideasBiology: the big ideaslesson 1.3blesson 1.3b

Life at every levelLife at every level

BiologyBiology studies a studies a wide range of living wide range of living things: from small to things: from small to huge. huge.

BiochemistryBiochemistry is the is the study of chemicals study of chemicals within living thingswithin living things

EcologyEcology is the study is the study of the interaction of of the interaction of living things & their living things & their environment environment

Biosphere

Ecosystem

Community

Population

The part of Earththat contains allecosystems

Community and its nonliving surroundings

Populations thatlive together in a defined area

Group of organisms of onetype that live in the same area

Biosphere

Hawk, snake, bison, prairie dog, grass, stream, rocks, air

Hawk, snake, bison, prairie dog, grass

Bison herd

Levels of organization: largestLevels of organization: largest

Organism

Groups ofCells

Cells

Molecules

Individual livingthing

Tissues, organs,and organ systems

Smallest functionalunit of life

Groups of atoms;smallest unit of most chemicalcompounds

Bison

Nervous tissue Nervous systemBrain

Nerve cell

Water DNA

to smallestto smallest

Whiteboard: what level to we belong to?

The “big ideas” of biologyThe “big ideas” of biology

Science is a way of knowingScience is a way of knowing– Science is more than a Science is more than a

collection of factscollection of facts

Nature is interdependentNature is interdependent – Everything in nature interacts Everything in nature interacts

Matter & energy interactMatter & energy interact– Living things convert matter Living things convert matter

into energy to liveinto energy to live

Pair/share: what is an example of interaction not pictured here?

Information and heredityInformation and heredity– Life’s processes are Life’s processes are

directed by the directed by the information stored in the information stored in the genetic codegenetic code

Unity and diversityUnity and diversity– All living things are made All living things are made

up of the same up of the same molecules, yet are molecules, yet are incredibly diverse incredibly diverse

The cellular basis of lifeThe cellular basis of life – All life forms are made up All life forms are made up

of cells of cells

EvolutionEvolution – Living things have changed Living things have changed

over the history of the earth over the history of the earth Structure and functionStructure and function

– Living structures reflect their Living structures reflect their functionfunction

HomeostasisHomeostasis– Living things use energy to Living things use energy to

maintain their internal maintain their internal environment environment

archaeopteryx

P/S: how do birds wings help them fly?

Summary Summary

Today’s talk was about………………….Today’s talk was about………………….

I already knew that……………………I already knew that……………………

I just learned about………………..I just learned about………………..

I’d like to learn more about………………….I’d like to learn more about………………….