Cells

When a thin slice from an onion is viewed through a microscope, lots of little box-like shapes are seen. These shapes are most likely

• atoms

• cells

• dust

• bubbles

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How can a Paramecium carry out all of life’s functions?

• by having specialized cells

• by being larger than most organisms

• by being smaller than most organisms

• by carrying out all life functions in one cell

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Which best explains why a human needs many cells to survive?

• Each individual cell is too small to function alone.

• Each cell joins with other cells to form one massive cell.

• Each cell works with other cells to perform all necessary life functions.

• Each cell absorbs a different gas from the environment necessary for

  human survival.

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Which accurately explains how the organism is capable of survival?

• An amoeba can perform all of life’s processes even though it is single-

  celled.

• A grasshopper can live off only one food source even though it is

  single-celled.

• A fish can exist if it lives in a group with many organisms even

  though it is single-celled.

• An earthworm can survive by using its long, straight digestive system

  even though it is single-celled.

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Which of these is a structure that is present in all organisms?

• A cell

• A tissue

• A stomach

• A brain

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Which cell can survive without the help of other cells?

• leaf cell

• onion cell

• yeast cell

• muscle cell

Which best describes all unicellular organisms?

• every cell is round

• every cell can make food

• every cell can move on its own

• every cell performs all life functions

Which is true about the cells from a multicellular organism and a unicellular organism?

• only the cells from a multicellular organism can specialize

• only the cells from a unicellular organism can specialize

• both organisms have cells that can specialize

• neither organisms have cells that can specialize

What is the main function of a nerve cell?

• communicate with other cells by sending signals

• carry gases and nutrients

• protect and transport materials in and out of the body

• contract and expand to make things move

What is the main function of a blood cell?

• communicate with other cells by sending signals

• carry gases and nutrients

• protect and transport materials in and out of the body

• contract and expand to make things move

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