Human Body Life Science

Miranda learned how the human body performs vital functions. What's the most basic level of organization of the human body?

• organ

• system

• tissue

• cell

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An elephant is a multicellular organism that weighs about 200 pounds at birth and can grow to weigh as much as 15,000 pounds. What increases as the elephant grows into an adult?

• the size of each body cell

• the number of cells in its body

• the amount of energy in its cell

• the collection of water in its cell

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Jonny climbed an apple tree. How are Jonny and the apple tree similar to each other?

• both are made of cells

• both take in carbon dioxide

• both get nutrients directly from soil

• both get energy from other organisms

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Which of these is the fundamental unit of life?

• system

• organ

• tissue

• cell

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Organisms that are classified as multicellular must have:

• only one cell

• large cells

• more than one cell

• identical cells

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When the heart, blood vessels, kidneys and bladder work together, they are BEST described as

• cell

• tissue

• organism

• system

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Which of the following indicates the correct representation of the levels of organization in living systems?

• ecosystems → organs → organisms → tissues → cells → organ systems

• tissues → cells → organ systems → organisms → organs → ecosystems

• organisms → tissues → organ systems → cells → organs → ecosystems

• cells → tissues → organs → organ systems → organisms → ecosystems

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The human brain is an organ that is made up of many tissues. This information can be used to determine that the brain is

• unicellular

• multicellular

• part of a bacterial colony

• able to function independently

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There are many different types of living cells on Earth. Which of these characteristics do all living cells have in common?

• require water for survival

• require silicon for structural support

• require oxygen for respiration

• require sunlight for photosynthesis

If a nerve cell stopped functioning, the cell would

• start producing oxygen

• begin dividing into more cells

• become a different type of cell

• stop sending signals to the brain

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