Aim: How do we know the difference between living and nonliving things?

What is the science of biology?What is the science of biology?

Biology is the study of life

CHARACTERISTICS OF CHARACTERISTICS OF LIFELIFE

CellsCells: Basic units of structure & function: Basic units of structure & function

Energy and MetabolismEnergy and Metabolism: Chemical : Chemical reactions in cellsreactions in cells

HomeostasisHomeostasis: Internal Balance: Internal Balance

ReproductionReproduction: Produce offspring: Produce offspring

CellsCells

Basic units of Basic units of structure & structure &

functionfunction

Living Things Are Made Up of One or More

Cells

ENERGY and METABOLISM

Energy is required to maintain life and for growth and development.

Metabolism includes all of the chemical reactions that occur in an organism.

HOMEOSTASIS Break down the word:

homeo - Constant or the same

stasis – balance

The ability of the body to maintain a relatively constant

internal condition, regardless of the external environment.

REPRODUCTIONREPRODUCTION

Reproduction: the ability of an organism to

produce a NEW organism.

What do all these images have in

common? How are they different?

Eight Life FunctionsEight Life Functions NutritionNutrition TransportTransport

Cell RespirationCell Respiration ExcretionExcretion Synthesis Synthesis RegulationRegulation

Growth Growth ReproductionReproduction

NUTRITIONNUTRITIONAll organisms get nutrients through their All organisms get nutrients through their

food!food!a. Autotrophic: refers to organisms that make a. Autotrophic: refers to organisms that make their own foodtheir own foodb. Heterotrophic: refers to organisms that get b. Heterotrophic: refers to organisms that get nutrients from the environmentnutrients from the environment

Heterotroph Autotroph

TransportTransport Organisms circulate and absorb Organisms circulate and absorb

materials through the cells (food and materials through the cells (food and waste)waste)

The circulatory system (blood) The circulatory system (blood) transports nutrients to the cellstransports nutrients to the cells

Cell RespirationCell RespirationChemical energy stored in nutrients is released during cellular respiration

Occurs in the Mitochondria

SYNTHESISSYNTHESIS To make or to build from small to large.To make or to build from small to large. Many sugars make a carbohydrateMany sugars make a carbohydrate

Many amino acids make a proteinMany amino acids make a protein

ExcretionExcretion Get rid of Get rid of Metabolic (cellular) wasteMetabolic (cellular) waste Ex: CO2, urine, sweatEx: CO2, urine, sweat

REGULATIONREGULATION To controlTo control Nervous System (brain) and Nervous System (brain) and

Endocrine System (hormones)Endocrine System (hormones)

GROWTHGROWTH Increasing the Increasing the sizesize or or numbernumber of cells of cells

Cells increase in size or cells split to

make new cells

REPRODUCTIONREPRODUCTION To have offspring (children)To have offspring (children) Asexual reproduction (one parent, cell splits)Asexual reproduction (one parent, cell splits)

Sexual reproduction (two parents, sperm and egg)Sexual reproduction (two parents, sperm and egg)

The Living Environment Name:_____________________The Living Environment Name:_____________________  

Features of LifeFeatures of Life List 4 characteristics that scientist look for when they want to determine life:List 4 characteristics that scientist look for when they want to determine life:

1.1. ________________________________________________________

2.2. ________________________________________________________

3.3. ________________________________________________________

4.4. ________________________________________________________ Label the life characteristic that is represented in each diagram.Label the life characteristic that is represented in each diagram.

A mission to Mars has found a specimen and brought it back to Earth. As a biologist, your job is to A mission to Mars has found a specimen and brought it back to Earth. As a biologist, your job is to figure out if the following specimens is living or non living. Explain how you will determine whether figure out if the following specimens is living or non living. Explain how you will determine whether it is living or non living. (use complete sentences)it is living or non living. (use complete sentences)___________________________________________________________________________

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Under a microscope Under a microscope