Characteristics of Life

What is the most basic unit of life?

• cell
• tissue
• organ
• organ system

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Reproduction that only involves one parent and all offspring are identical; for example, binary fission of bacteria or amoebas.

• Asexual

• Sexual

• Division

• Addition

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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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Living things are based on a universal genetic

code. What molecule is responsible for that code?

• RNA

• Lipid

• Protein

• DNA

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For single-celled organisms, _____ is

mostly an increase in size.

Multicellular organisms go through a

process called __________, where cells

divide and differentiate into different

kinds of cells.

• Evolve, respond to stimulus

• Expansion, progress

• Growth, development

• Production, evolution

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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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