Characteristics of Life

What is the most basic unit of life?

• cell
• tissue
• organ
• organ system

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How do heterotrophs get the energy they need to survive?

• photosynthesis

• eating other organisms

• decomposing dead materials

• chemosynthesis

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A _____ is something in the environment that causes an organism to respond.

• stimulus
• response
• cause
• effect

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When a baby kitten becomes an adult cat, this is an example of...

• energy metabolism
• growth and development
• response to stimuli
• having cells

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Reproduction that involves two cells from different parents unite to produce the first cell of a new organism.

• Asexual

• Sexual

• Budding

• Division

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Maintaining a stable internal

environment is called

• homeostasis

• equilibrium

• balance

• evenness

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Multicellular means

• made of many cells
• made of one kind of cell
• made of only one cell

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Which of the following is NOT a characteristic shared by all living organisms?

• Ability to move
• Ability to grow and develop
• Made up of one or more cells
• Responds to stimuli

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Organisms, such as bacteria, are ______________ which means they consist of only a single cell.

• unicellular
• multicellular
• autotrophic
• heterotrophic

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Which of the following is an example of homeostasis?

• adapting to your environment

• maintaining an appropriate respiration rate

• the sum of all of your chemical reactions

• being composed of more than one cell