Characteristics of Life

What is the most basic unit of life?

• cell
• tissue
• organ
• organ system

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The scientific name for something living is a(an)

• organism
• cell
• tissue
• human

An organism made of one cell is called

• unicellular
• multicellular

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It is hot outside. You start sweating. In this case, the hot weather is the...

• stimulus
• response
• cause and effect
• responder

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The combination of chemical reactions through

which an organism builds up or breaks down

materials as it carries out its life processes is called ...

• absorption

• metabolism

• digestion

• consumption

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Maintaining a stable internal

environment is called

• homeostasis

• equilibrium

• balance

• evenness

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When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. Which characteristic of life does this represent?

• All living things use energy

• All living things contain cells

• All living things maintain homeostasis

• All living things grow

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Green plants produce their own food through the process of photosynthesis. Which characteristic of life does this represent?

• All living things use energy

• All living things contain cells

• All living things maintain homeostasis

• All living things grow

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A baby song bird hatches from its egg with both parent songbirds watching. Which characteristic of life does this represent?

• All living things reproduce

• All living things maintain homeostasis

• All living things use energy

• All living things grow

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A camel has eyelashes that work to keep the dust and sand out of its eyes. Which characteristic of life does this represent?

• All living things adapt to their environment

• All living things grow

• All living things have cells

• All living things use energy

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