Introduction to Biology

Biology= the science of life organism= a living thing cell= basic unit of life unicellular= made up of one cell multicellular= made up of multiple cells homeostasis= balance reproduction= producing more new organisms DNA= large molecule that contains genetic information gene= a short segment of DNA that contains information for your traits 2 Type of Reproduction: 1. sexual -> requires someone else 2. asexual -> do not need someone else evolve= change ecology= the interactions of …

…one another and their environment ecosystems= environmental communities photosynthesis= plants make food and energy autotrophs= produce their own food; plants heterotrophs= eat food produced by autotrophs Characteristics of living things: 1. cells= made up of cells 2. highly organized at both the molecular and cellular levels 3. energy (metabolism) 4. homeostasis= maintain stable conditions inside the body 5. grow *cell division (mitosis) *formation of 2 new cells from one cell *development -> child -> adult 6. reproduction= form new organisms