Characteristics, Needs and Classification of Living Things Diversity of Life Characteristics, Needs and Classification of Living Things

Biologists believe there are 7 signs of life: Organization Respond to Their Environment Perform Chemical Reactions Take in Energy Grow Reproduce Die

Made up of at least one cell Organization Made up of at least one cell

Respond to environment Some can move from place to place Some respond to gravity, light, and temperature

Perform chemical reactions Breaking down food to release energy (cellular respiration) Building new cells (mitosis and meiosis) Transport of needed materials Excrete waste products

Consumers (heterotrophs) or producers (autotrophs) Take in energy Consumers (heterotrophs) or producers (autotrophs)

gRow Grow and develop Some organisms just get larger in size Some organisms change shape as they grow

To male more of the species Sexually 2 parents not identical offspring reproduce To male more of the species Sexually 2 parents not identical offspring Asexually 1 parent Genetically identical

die Every living thing has life span Some have very short and some have very long lifespans Some live a few days or weeks and other live thousands of years

Water Food Light Temperature Living Space Oxygen Needs of living things Water Food Light Temperature Living Space Oxygen

Transport materials needed throughout the organism Water and food WATER Transport materials needed throughout the organism Dissolves minerals FOOD Provide energy for the organism Some decompose, some eat and some make their own

Sunlight used to make food for producers Temperature Light and temperature Light Sunlight used to make food for producers Temperature Some live in warmer temperatures and others in cooler temperatures

An organism’s living space provides for: Needed resources Mate Because of limited space on Earth, there is competition

Needed for respiration in order to release the energy from nutrients oxygen Needed for respiration in order to release the energy from nutrients

What is classification? Classification is the grouping of things according to characteristics The science of classifying organisms is known as taxonomy

Early classification systems Aristotle grouped animals according to the way they moved John Ray was the first to use the term “species”

Binomial Nomenclature Developed by Linnaeus Two-name system Each organism has a genus and a species name First name (genus); second name (species)

What is a scientific name? Combination of the genus and species name of an organism Scientific names of organisms are always italicized or underlined: (Genus is capitalized & species name is lower-case)

Eight classification groups of living things Domain Kingdom Phylum Class Order Family Genus Species

Eight Levels of classification D id K ing P hillip C ome O ver F or G ood S oup Domain