Basic Biological Principles

There are many criteria that are used to define living things. Living things reproduce, grow, and develop. They respond to stimuli, use materials and energy, and evolve and adapt over time to their environment. What is another criteria used to define living things?

• All living things are made of cells.
• All living things are intelligent.
• All living things are complex.
• All living things are able to move.

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All living organisms use energy. They also grow and reproduce. What is another characteristic of all living organisms?

• All living organisms are composed of one or more cells.
• All living organisms must consume food in order to acquire nutrition.
• All living organisms consist of many cells with specialized organelles.
• All living organisms can produce glucose through photosynthesis.

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An organ system is made up of

• organs that work together to perform a certain function.
• organisms that have similar behaviors and appearances.
• identical cells that perform the same function.
• all of the tissues found in an individual organism.

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Cells have particular structures that perform specific jobs. These structures are known as _______.

• organelles
• organs
• systems
• tissues

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What are the most basic building blocks of all organisms?

• bones
• cells
• muscles
• organs

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A group of tissues working together is _______.

• a cell
• a compound
• an organ
• an organelle

When a group of cells work together, such as in bones, muscles, or nerves, they are known as _______.

• a tissue
• an organ
• an organelle
• an organism

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Cell theory states that

• new cells are produced by existing cells.
• cells are the basic unit of structure and function in living things.
• all living things are composed of cells.
• All of these answers are correct.

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The life forms exhibiting the simplest cellular structure are _______.

• eukaryotes
• organelles
• prokaryotes
• proteins

Which of the following describes the fundamental difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells are all viruses and rely on the infection of a host cell to replicate.
• Eukaryotic cells are only found in protists, bacteria, and viruses.
• Eukaryotic cells are the only type of cells that can possess a cell wall.
• Prokaryotic cells do not have a true nucleus or membrane-bound organelles.