Life Science (5.L.1.1)

Which is a characteristic of most single-celled organisms?

• They have a complex nervous system.

• They contain several different types of cells.

• They perform all life processes.

• They have a circulatory and a respiratory system.

Which statement best describes how a multicellular organism survives?

• Every cell carries out the same functions for the survival of the organism.

• The cells all have the same structures that allow the organism to survive.

• All life processes are performed by each cell for the survival of the organism.

• The cells have different functions, and together they are essential for the survival of the organism.

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Which statement best explains how a bacterial cell is capable of surviving as a single-celled organism?

• It is able to create new cells more slowly than other kinds of cells.

• It is large enough to capture the food it needs for growth.

• it is so small, it can survive in almost any place.

• It has the ability to carry out all of its life functions.

In what way are insects and humans similar?

• Both are single-celled organisms.

• Both are multicellular organisms.

• Both have cells that capture sunlight to make food.

• Both have cells that carry out all life functions.

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Fungi and bacteria are both single-celled organisms. What do they most likely have in common?

• Both fungi and bacteria are large organisms.

• Both fungi and bacteria can carry out all life functions in their one cell.

• Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.

• Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.

Which organism is single-celled?

• bacteria

• tree

• dog

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Which best explains why both cats and humans are multicellular organisms?

• They get energy from many food sources.

• They get energy from a single food source.

• They need only one cell to meet their basic needs.

• They need many cells working together to meet their basic needs.

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An organism can only be seen through a microscope. Which is most likely true of that organism?

• It is a plant.

• It is an animal.

• It is multicellular.

• It is single-celled.

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Why do humans require many different types of cells to survive?

• Human cells are identical and work together to perform the same function.

• Human cells are specialized and work together to perform the same function.

• Human cells are identical and work independently to perform different functions.

• Human cells are specialized and work independently to perform different functions.

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Which is an example of multi-celled organisms?

• amoeba

• bacteria

• crickets

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