Cells, Human Body Systems, and Evolution and Genetics

Which one of the following is a single-celled organism?

• Dog

• Fish

• Amoeba

• Worm

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Why do multicellular organisms need transport systems?

• They cannot grow in their own environment

• They need food from an outside source

• To exchange gases with the outside environment

• To receive more energy than what they already have

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Which statement BEST describes a single-celled organism?

• It is part of a bigger organism.

• It has many different types of cells.

• It is a complete organism.

• It has more than one cell.

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What do single-celled organisms and multicellular organisms have in common?

• They are both able to make their own food from the sun.

• They are both the same size.

• They can both get rid of their waste.

• They both have special cells within the organism to do certain jobs.

Which of the following is BEST to figure out if an organism is unicellular or multicellular?

• What the organism eats

• The number of cells in the organism

• How the organism grows

• How the organism gets rid of waste

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NGSS.MS-LS1-1

Which of the following is NOT a sign of all living things?

• It breaths

• It grows

• It reproduces

• It uses energy

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Which of the following is a non-living thing?

• A cell

• A dog

• A molecule

• A tree

Under a microscope, you see an organism that has many hair-like wisps around it. Which type of unicellular organism are you most likely looking at?

• amoeba

• euglena

• paramecium

• stomach cells

Which of the following is a sign of a unicellular organism?

• A cell that only controls thinking

• A cell that only controls a heart

• A cell that only controls a stomach

• A cell that takes care of many jobs at once

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NGSS.MS-LS1-1

Plants have cells that only transport food throughout the flower. This means…

• Plants are carnivores

• Plants are multicellular

• Plants are unicellular

• Plants are non-living things

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