All living things are made up of cells., , All living things contain similar chemicals., , All living things use energy., , All living things grow and develop., , All living things respond to their surroundings., , All living things reproduce., , Cells are the basic unit of structure and function in all living things., , Most cells are so tiny you need a microscope to see them., , Unicellular organisms are made up of one cell., , Multicellular organisms are made up of multiple cells., , The cells of all living things are composed of chemicals., , The most common chemical in cells is water., , Carbohydrates are the energy source for cells., , Proteins and lipids are the building materials of cells., , Nucleic acids are the genetic materials of cells., , Cells use energy in order to grow and repair injured parts., , Cells are always hard at work and use lots of energy., , Growth means increasing in size., , Development means increasing in complexity., , If something changes in an organism's environment, living things will respond to that change., , A stimulus is a change in the environment., , A response is an action or change in behavior in reaction to a stimulus., , Reproduce means to create offspring that are similar to the parents., , Asexual reproduction is reproduction involving only one parent. The offspring are identical to the parent., , Sexual reproduction is reproduction involving two parents. The offspring are a combination of both parents., , Living things need energy to survive., , Living things need water to survive., , Living things need living space to survive., , Living things need stable internal conditions to survive., , All organisms use food as their energy source., , Organisms differ in the way they obtain food., , Autotrophs are organisms that make their own food., , Heterotrophs are organisms that need to obtain food., , Most animals are made of at least 70% water., , Most substances dissolve in water and can be easily transported throughout the body., , All organisms need a place to live to give them food, water, and shelter., , Only a limited number of organisms can live in any one location. That is why animals defend their territory., , Competition is the struggle among living things for food, water, shelter, or mates., , Because conditions in the environment can change so much, organisms must be able to keep conditions inside their body constant., , Homeostatis is the ability of an organism to keep conditions inside its body the same, even though conditions in the environment change., , Warm blooded animals maintain a constant body temperature., , Cold blooded animals have a body temperature that changes with the outside temperature., .

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