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What makes something alive ?
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What are living things? There are certain criteria that determine if something is living. Do ALL 9 criteria have to be met? Yes, ALL 9 criteria must be met.
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Organism Anything that possesses all of the following characteristics of life. Living things R-CHARGEED !!
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R - eproduce All living things produce offspring. Making copies of individuals by genetic transfer, sexually or asexually.
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C - ells -Living organisms show an orderly structure
(made up of cells) Centipede Cross-section of worm Examples: Leaf
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H - omeostasis The ability to maintain internal conditions separate from an outside environment. Example: The human body maintains an average temperature of 98.6 ºF.
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dapt to the environment R - espond to stimuli
A living organism will respond to an environmental condition called a stimulus. An adaptation is any characteristic of an organism that improves its chances of surviving in its environment A plant growing in a specific direction due to a light stimulus.
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Living Things Adjust To Their Surroundings
-living things interact with the environment -environment- biotic (living) and abiotic (nonliving) factors that an organism must constantly interact with (air, water, temperature, other organisms, etc.)
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rowth Getting Bigger / Increasing material D - evelopment
All of the changes that take place during the life of an organism. Maturing. Growth rings in a tree Amoeba absorbing nutrients
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Growth-increase in number of cells
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E - energy Metabolism. Chemical and energy transformations. All organisms need energy for all life activities. Even thinking requires a considerable amount of energy. Transforming glucose into ATP for energy (to do work).
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E - evolve The gradual accumulation of adaptations due to environmental stimuli. (Organisms with more suitable adaptations are more likely to survive and reproduce) Example: Owls, and other nocturnal animals have evolved large eyes for better night vision.
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