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Characteristics of Living Things. Based on Holt 12.1. Journal Entry. How can you tell if something is alive? List two things that are alive and two things that are not alive. 1. Living things use energy. All living things need to eat, drink, or absorb energy from the environment - PowerPoint PPT Presentation
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Based on Holt 12.1
How can you tell if something is alive?
List two things that are alive and two things that are not alive.
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All living things need to eat, drink, or absorb energy from the environment
Energy used to create and break down molecules
Metabolism: the total amount of activity happening in the body
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All living things (organisms) grow larger as they make more molecules
They either keep getting bigger or they make more organisms
Growing organisms often change in appearance
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Asexual reproduction: single parent makes identical offspring (children)◦ Similar to a clone
Sexual reproduction: Two parents make offspring that share traits of both parents
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DNA: molecule of information necessary for life◦ Tells the body what to do
and how it should look
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Stimulus: (plural = stimuli): things in the environment that change and cause reactions in living things
Examples: light, heat, water, food, sounds
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The body of organisms wants to stay “comfortable”
Homeostasis: keeping a stable internal environment
Examples: shivering, sweating, getting thirsty
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Cell: smallest living unit
Building block of living things
More details in Chapter 13!
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