Quiz #1 1. Which level of life includes all of the other levels in the list: organisms, cells,...
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Transcript of Quiz #1 1. Which level of life includes all of the other levels in the list: organisms, cells,...
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 (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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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
Eukarya
– Cells DO have nucleus
– Includes all organisms except prokaryotes
Plantae AnimaliaFungiProtista
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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
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.
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.