What is life?What is life?Chapter 2 section 1

ANIMALS

PLANTS

FUNGI

PROTISTS

BACTERIA ARCHAEA

Classification GroupsClassification Groups

Bacteria/ArchaeaBacteria/Archaea- - Prokaryotic,Unicellular, both Prokaryotic,Unicellular, both Hetero and AutotrophsHetero and Autotrophs

Protists-Protists- Eukaryotic, Unicellular and Multicellular, Eukaryotic, Unicellular and Multicellular, Hetero and AutotrophsHetero and Autotrophs

Fungi-Fungi- Eukaryotic, Unicellular and Multicellular, Eukaryotic, Unicellular and Multicellular, HeterotrophsHeterotrophs

PlantsPlants- - Eukaryotic, Multicellular, AutotrophsEukaryotic, Multicellular, Autotrophs Animals-Animals- Eukaryotic, Multicellular, Heterotrophs Eukaryotic, Multicellular, Heterotrophs

Key TermsKey Terms

OrganismOrganism CellCell UnicellularUnicellular MulticellularMulticellular StimulusStimulus ResponseResponse DevelopmentDevelopment Spontaneous generationSpontaneous generation AutotrophAutotroph HeterotrophHeterotroph HomeostasisHomeostasis

Chapter 2 Living Things I . What is Life?

a. organisms A. The Characteristics of Living Things

1. Cellular Organizationb.____________________c.____________________d.____________________

2.______________________________________________________3.______________________________________________________4.______________________________________________________

e.____________________f.____________________

5.______________________________________________________g.____________________

6.______________________________________________________ B._________________________________________________________

h.____________________1.______________________________________________________2.______________________________________________________

C._________________________________________________________1.______________________________________________________2.______________________________________________________

i.____________________j.____________________

3.______________________________________________________4.______________________________________________________

k.___________________

Characteristics of Living ThingsCharacteristics of Living Things

All living things have All living things have cellular organization, cellular organization, contain similar contain similar chemicals, use energy, chemicals, use energy, respond to their respond to their surroundings, grow and surroundings, grow and develop, and reproduce.develop, and reproduce.

All living things arise All living things arise from living things from living things through reproduction.through reproduction.

All living things must All living things must satisfy their basic needs satisfy their basic needs for water, food, living for water, food, living space and stable internal space and stable internal conditions.conditions.

ExperimentsPasteur’s Experiment

Redi’s Experiment

• Heterotroph- organisms that can not make their own food.

• Autotroph- organisms that make their own food.• Auto- self (producer)• Hetero- other (consumer)• Troph- feeder

AutotrophHeterotroph

Every organism can be classified at 7 different levels - kingdom, phylum, class, order, family, genus and species. Each level contains organisms with similar characteristics. The kingdom is the largest group and very broad. Each successive group contains fewer organisms, but the organisms are more similar. The species is the smallest group and is very narrow. Organisms within a species are able to mate and produce fertile offspring.

? Assessment ?? Assessment ?• 1.a. List the 6 characteristics of living things?1.a. List the 6 characteristics of living things?• b. a bird sitting on a tree flies away as you walk by. b. a bird sitting on a tree flies away as you walk by.

Which of the life characteristics explains the birds Which of the life characteristics explains the birds behavior?behavior?

• c. explain why the tree, which does not move away, is c. explain why the tree, which does not move away, is also considered a living thing?also considered a living thing?

• 2. a. What was meant by the idea of spontaneuos 2. a. What was meant by the idea of spontaneuos generation ? generation ?

• 3.a. What four things do all organisms need to survive?3.a. What four things do all organisms need to survive?• b. Which need is a fox meeting by feeding off berries?b. Which need is a fox meeting by feeding off berries?• c. The artic fox has thick, dense fur in the winter and c. The artic fox has thick, dense fur in the winter and

much shorter fur in the summer. How does this help the much shorter fur in the summer. How does this help the fox maintain homeostasis? fox maintain homeostasis?