Science Unit 6/7 Review

Which of the following would help a scientist decide if an organism is unicellular or multicellular.

• size
• what it eats
• how fast it grows
• how many cells it has

Which two human body systems are MOST responsible for getting oxygen to cells?

• skeletal and circulatory
• circulatory and respiratory
• digestive and skeletal
• respiratory and digestive

What body system is shown in the picture?

• Digestive
• Reproductive
• Respiratory
• Circulatory

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

• by performing all life processes in one cell
• by being smaller than most organisms
• by having specialized cells
• by being larger than most organisms

Which is an example of a multi-cellular organism?

• paramecium
• amoeba
• insect
• bacteria

Which example best shows structures that make up the digestive system in the human body?

• esophagus, stomach, intestines
• heart, blood, vessels
• nose, trachea, lungs
• brain, spinal cord, nerves

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

• They are both large organisms
• They can both carry out life functions in one cell
• They both need sunlight and nutrients from the soil to grow
• They are both highly specialized and must work with other cells

Which body system sends messages or electrical signals to all other body systems?

• muscular system
• nervous system
• digestive system
• circulatory system

Which system produces red blood cells?

• nervous
• digestive
• skeletal
• circulatory

Bone cells need nutrients. Which two systems get nutrients to bone cells?

• the respiratory system and the skeletal system
• the skeletal system and the digestive system
• the circulatory system and the respiratory system
• the digestive system and the circulatory system