Lecture 1-1 Autumn in Colorado. A biologist: Poses and answers questions about the natural world. ...
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Transcript of Lecture 1-1 Autumn in Colorado. A biologist: Poses and answers questions about the natural world. ...
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Lecture 1-1The science of life
Autumn in Colorado
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A biologist: Poses and answers
questions about the natural world.
Studies the interactions of living things and the environment.
Studies organisms from a cell to the biosphere.
The world of biology
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Biology and society
Polio vaccinations: Pakistan
Other concerns of biologists:
Pollution Disease prevention
and cures Improving our food
supply
Children with polio
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What are the characteristics of living things?
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Living things are all madefrom cells.Cells can form tissues.Tissues build organs.Groups of organs build organ systems.All together organism.
Organization and cells
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Response to stimuli
Living things respond to their external and internal environments.
Light changes Hunger Pain Threat Survival
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Organisms have regulatory systems that keep their ‘insides’ from changing.
Ex: sweating Shivering Wilting (plants)
Homeostasis
Feliz Sudor
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Metabolism Living things all use energy to carry outtheir life processes.Plants get energy from ?Herbivores?Carnivores?Omnivores?
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Life increases in size Growth happens when cells divide Development is change as the organism matures.
Growth and development
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Since all things die, reproduction carries life into the next generation.
DNA carries genetic informationfrom one generation to thenext.
Reproduction
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Evolution: change over time
Plant evolution
Horse evolution
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Redwood forestPhoto by Grant Collier