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Published byMillicent Nelson Modified over 9 years ago
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Studying Life
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What is Biology? bios means… “Life” -logy means… “study of” Biology is the study of living things.
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1. Made of cells Unicellular organisms: A living thing made of only ONE cell uni- means “one” Some are composed of many cells Multicellular organisms multi- means “many”
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2. Reproduce Two types of reproduction Asexual Reproduction No egg and sperm involved A piece of an organism becomes a new organism Sexual Reproduction Egg and sperm unite
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3. Genetic code Living things contain genetic codes DNA or RNA Codes are passed from parent to offspring Can be used to solve crimes.
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4. Growth and Development All living things grow during at least part of their lives Unicellular increase in size Multicellular grow in size and change or develop
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5. Need Materials and Energy METABOLISM all of the chemical reactions within the body Materials are broken down or built up Energy is a requirement (used) and must be obtained (available)
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6. Respond to the Environment
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7.Homeostasis organisms keep internal conditions, constant. Example: Temperature
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8. Evolution Organisms show relationship to other organisms A group of organisms change over time due to survival of the fittest
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QUICK PRACTICE The following are all examples of the characteristics of life. Identify each one by matching a word from the top to a word phrase from the bottom. A. Evolution D. genetic code G. Respond to stimulus B. Made of cells E. Grow and develop H. Homeostasis C. Reproduce F. Use/need energy 1. A person looks like their mother. 2. You eat a hamburger for lunch. 3. A baby gains 3 pounds in one week and begins to recognize voices. 4. A polar bear has white fur to blend in with the snow. 5. Your start to cry whenever you get a shot at the doctor’s office. 6. You begin to shiver because it is cold outside. 7. Red and white particles make up part of your blood. 8. A chick breaks out of an egg.
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