1. Living things are made of cells These units help to organize their materials.
Examples of Cells Nerve cell Red blood cell Fat cell Egg and sperm Cheek cell
2. Living things reproduce Why is this so important? How do plants reproduce? How do animals reproduce? pollen Egg and sperm Euglena separate
Types of Reproduction Sexual Reproduction Two parents unite to form a new organism Asexual Reproduction A single parent divides itself two produce offspring
3. Living things are based on a universal genetic code (DNA). All living things have the same bases (A, T, C, G) in their DNA-they are just in different order
4. Living things grow and develop Each organism has a pattern of growth and development characteristic of its species.
5. Living things obtain and use materials and energy Organisms take in energy and transform it to perform all of life’s activities. -metabolism -photosynthesis
Metabolism = Combination of chemical reactions through which an organism builds up or breaks down materials.
6. Living Things Respond to Their Environment All organisms respond to environmental stimuli. Nikon MicroscopyU Movie Gallery: Paramecium (Protozoan) Video No. 3Nikon MicroscopyU Movie Gallery: Paramecium (Protozoan) Video No. 3 Eye spot (responds to light)
Stimulus-Response A stimulus is a signal to which an organism responds.
7. Living Things Maintain a Stable Internal Environment The environment outside an organism may change, but regulatory mechanisms maintain an organisms’ internal environments within limits that sustain life. HowStuffWorks "Homeostasis"