Features of living thingsFeatures of living things

Lecture 1.3Lecture 1.3

What does it mean to be living?What does it mean to be living?

There are differences There are differences between living and non-between living and non-living things.living things.

Icicles grow, but are Icicles grow, but are they alive?they alive?

A fire responds and A fire responds and converts energy, but is it converts energy, but is it alive?alive?

Features of living thingsFeatures of living things

All living things share the same 8 characteristicsAll living things share the same 8 characteristics

Living things are made of units Living things are made of units called cellscalled cells

Living things reproduceLiving things reproduce

Living things are based on a Living things are based on a universal genetic codeuniversal genetic code

Models of deoxyribonucleic acid: DNA

Living things grow ….Living things grow ….

And And developdevelop

Wood frog life cycle

Development is change over time

Living things obtain and use Living things obtain and use materials and energymaterials and energy

Energy is stored in the form of ATPEnergy is stored in the form of ATP

Living things respond to their environment

Living things maintain a stable internal environment : Living things maintain a stable internal environment : homeostasishomeostasis

Why does one shiver and the other sweat?

As a group, living things change over As a group, living things change over timetime

Horse and plant evolution