Post on 29-Jan-2016
Lecture 1-1The science of life
Autumn in Colorado
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
Biology and society
Polio vaccinations: Pakistan
Other concerns of biologists:
Pollution Disease prevention
and cures Improving our food
supply
Children with polio
What are the characteristics of living things?
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
Response to stimuli
Living things respond to their external and internal environments.
Light changes Hunger Pain Threat Survival
Organisms have regulatory systems that keep their ‘insides’ from changing.
Ex: sweating Shivering Wilting (plants)
Homeostasis
Feliz Sudor
Metabolism Living things all use energy to carry outtheir life processes.Plants get energy from ?Herbivores?Carnivores?Omnivores?
Life increases in size Growth happens when cells divide Development is change as the organism matures.
Growth and development
Since all things die, reproduction carries life into the next generation.
DNA carries genetic informationfrom one generation to thenext.
Reproduction
Evolution: change over time
Plant evolution
Horse evolution
Redwood forestPhoto by Grant Collier