7 Characteristics Of Living Things Biology

Question: 1) Organization and Cells
Answer: Organization- the high degree of order within an organism's internal and external parts and in its interactions with the living world.

Cell- the smallest unit that can perform all of life's processes.

*atom-biological molecule-organelle-cell-tissue-organ-organ system
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Question: 2) Response to Stimuli
Answer: Stimulus- physical/chemical change in the internal/external environment.

ex: When you touch a hot stove, your brain sends a signal to your nerves, causing you to respond.
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Question: 3) Homeostasis
Answer: Homeostasis- the maintenance of stable internal conditions even though environmental conditions are constantly changing.
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Question: 4) Metabolism
Answer: Metabolism- sum of all the chemical reactions that take in and transform energy and materials from the environment.

ex: Photosynthesis- plants use sun's energy to produce glucose
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Question: 5) Growth and Development
Answer: -all living things grow and increase in size using cell division
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Question: 6) Reproduction
Answer: Reproduction- organisms transmit hereditary info to their offspring

2 types- Asexual and Sexual
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Question: 7) Change Through Time (Evolution)
Answer: -populations of living organisms evolve over time
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Question: Atom
Answer: -simple particle of an element that retains all the properties of a certain element
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Question: Biological molecule
Answer: -chemical compounds that provide physical structure and that bring about movement
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Question: Organelle
Answer: -tiny structure that carries out functions necessary for the cell to stay alive
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Question: Cell
Answer: -smallest unit that can perform all of life's processes
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Question: Unicellular
Answer: -organisms that are made up of one cell (ex: bacteria)
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Question: Multicellular
Answer: -organisms that are made up of one or more cells (ex: humans)
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Question: Tissue
Answer: -group of cells that have similar abilities and that allow the organ to function
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Question: Organ
Answer: -structure that carries out specialized jobs within an organ system
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Question: Organ system
Answer: -group of organs that carries out a more generalized set of functions
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Question: Cell Division
Answer: -formation of two new cells from an existing cell

Unicellular- new identical offspring
Multicellular- replacing cells/ development
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Question: Development
Answer: -process by which an organism becomes a mature adult
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Question: Genes
Answer: -short segment of DNA that contains the instructions for a single trait of an organism
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Question: Asexual reproduction
Answer: -hereditary info from different organisms is not combined
(offspring are genetically identical)
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Question: Sexual reproduction
Answer: -hereditary info is recombined from two organisms of the same species
(offspring is not identical)
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