Quiz #1

1. Which level of life includes all of the other levels in the list: organisms, cells, biosphere, molecules, and ecosystems? Explain your answer.

2. Identify an Ecosystem in the area where you live? Explain why it is an Ecosystem.

3. What are genes? How are they related to DNA?

Concept 1.1

Biology explores life from the global scale to the microscopic scale.

ObjectiveIdentify major organizational levels of life.

Key TermsBiosphere, ecosystem, organism, cell, DNA, gene

EcosystemCommunityPopulationOrganismOrgan Systems

TissueCell

DNA and Genes (Molecule)

Atom

Organs

Organelle

Biosphere

EcosystemFlorida coast

CommunityAll organisms onthe Florida coast

PopulationGroup of brown

pelicans

OrganismBrown pelican

Organ systemNervous system

OrganBrain

TissueNervous tissue

CellNerve cell

OrganelleNucleus Molecule

DNA

AtomNucleus

Brain

Spinal cord

Nerve

Biosphere

Levels of Organization(large scale)

• Biosphere– All the part of the

planet inhabited by living organisms.

Levels of Organization(large scale)

• Ecosystem– Both living

organisms and non-living or physical components of environment in a particular area

Levels of Organization(large scale)

• Community– All interacting

organisms in an area (living component only)

Levels of Organization

PopulationIndividuals of one species living in same

area

Levels of Organization

• Organism– An individual

living thing

Levels of Organization (within an Individual)

• Organ Systems– group of organs

that work together in performing vital body functions

• excretory, nervous

Levels of Organization (within an Individual)

• Organs– structure consisting of

several tissues adapted as a group to perform specific functions

• liver, intestine

liver

Levels of Organization (within an Individual)

• Tissues– integrated group

of cells with a common function, structure, or both

Bone tissue

Levels of Organization (within an Individual)

red blood cell

• Cells- – most basic unit

of life.

– can perform all functions necessary for life.

Levels of Organization (within an Individual)

• DNA - The Chemical responsible for inheritance

• Genes - Units of inherited information

• Molecules - Cluster of atoms

DNA, lipid, carbohydrate

Levels of Organization (within an Individual)

• Atom– Smallest

particle of ordinary matter

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Homework

1. Outline and complete: Concept check 1.2

2. Kingdom Exploration Pre-Lab

Concept 1.2Biology explores life in its diverse forms

Objectives1. Use the term species in discussing life’s diversity.

2. Explain the basic strategy biologists use in classifying organisms.

3. Identify a characteristic that separates the domains Bacteria and Archaea from the domain Eukarya.

Key TermsSpeciesdomainunicellularprokaryotic celleukaryotic cellmulticellular

Three Domains of Life

• taxonomy– branch of biology that names & classifies species

• Domain– Highest level of taxonomic classification used by

biologists

1. Bacteria

2. Archaea

3. Eukaryaprokaryotes

Archaea

Bacteria

In Prokaryotes, the cells do not have

a nucleus

Eukarya

– Cells DO have nucleus

– Includes all organisms except prokaryotes

Plantae AnimaliaFungiProtista

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Concept 1.3 Ten themes unify the study of life

Concept 1.3Ten themes unify the study of life

ObjectivesIdentify the 10 themes of Biology

Key TermsSystemPhotosynthesisProducerConsumerHomeostasisAdaptationPopulationNatural SelectionEvolution

Ten themes unify the study of life

1. Biological systems2. The cellular basis of life3. Form and Function4. Reproduction and inheritance5. Interaction with the environment6. Energy and life7. Regulation8. Adaptation and Evolution9. Biology and Society10. Scientific Inquiry

Biological systems (Figure 1-8)

The cellular basis of life(Figure 1-10)

Form and Function

Reproduction and inheritance

Interaction with the environment

Energy and life

                                                                                                                                                                                                    

Figure 1-15Energy enters an ecosystem as sunlight. Plants are producers that convert light energy to chemical energy stored in food. Animals and other consumers obtain their energy in chemical form by eating. Energy exits an ecosystem as heat, which all organisms generate as they perform work.

Regulation

Adaptation and Evolution

                                                                                                                                                                                                                                                     

                                         

Figure 1-19In this hypothetical example of natural selection, darker beetles are more likely to survive longer and reproduce, passing their genes on to more offspring.

Biology and Society

Scientific Inquiry

Walter Reed

A yellow fever mosquito feeding